Select the correct answer.
In an isolated system, two copper bars at different temperatures transfer energy until both are at the same temperature. How would the
transfer of energy be different if the bars were in an open system?


O A. Energy transfer would occur only between the copper bars.
OB. Energy transfer would occur between the copper bars and the surroundings.
Ос. No energy transfer would occur between the copper bars or the surroundings.
OD. Energy transfer would occur only with the surroundings.
Reset
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San ou

Select The Correct Answer.In An Isolated System, Two Copper Bars At Different Temperatures Transfer Energy

Answers

Answer 1

Answer:

OB. Energy transfer would occur between the copper bars and the surroundings.

Explanation:

We define an isolated system as a system in which there is neither exchange of material nor energy while an open system is one in which materials and energy can be exchanged with the environment.

Given an open system consisting of two copper bars at different temperatures, energy will not only be exchanged between the copper bars but also between the copper bars and the environment.


Related Questions

which process requires more energy to be released, condensation or freezing? explain

Answers

Answer:

Condensation

Explanation:

the process of evaporation and condensation takes 7.5 times as much energy as melting or freezing.

According to the forces of attraction, condensation process  requires more energy to be released,as in the process state is changing from less orderly state to a more orderly state.

What are forces of attraction?

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

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How does increasing temperature affects reaction rate?

Answers

Answer: It increases the reaction rate.

Step-by-step explanation:

The particles gain kinetic energy.

The graph shows the speed of a car
traveling east over a 12 second
period. Based on the information in
the graph, it can be concluded that
in the first 6 seconds, the car is -
A changing its direction.
B experiencing less and less
friction.
moving at a constant speed
D climbing a steep incline.

Answers

Answer:

Letter B.

Explanation:

Changing its direction and climbing a steep incline can't be proven only by the graph info. You can see that it's speed isn't constant in the graph.

We have letter B left.

PLS HELP ON A TIMER!
if the pressure exerted by a sample of carbon dioxide at 25° C in a volume of 0.44L is 3.81 atm, what is the mass of the carbon dioxide?
A. .0685
B. 1.65
C. 3.02
D. 14.4

Answers

Answer:

3.02

Explanation:

Which statement is true about the rotational period of the moon?


greater than the revolution period around Earth


always changing


less than the revolution period around Earth


equal to the revolution period around Earth

Answers

less than the revolution perilous around earth

The statement is true  about the rotational period of the moon " the rotational period of the moon is equal to the revolution period around Earth."

What is rotational period?

A celestial object's rotation period may relate towards its sidereal rotation period, which is the time it takes for the object to complete one revolution around in its axis of rotation in sidereal seems like to the background stars.

What is revolution period?

The orbital period is also known as the revolution period. it takes for one astronomical object to complete one cycle around another. It refers to planets and asteroids orbiting the Sun, moons orbiting planets, planetary systems orbiting other stars, or double stars in astronomy.

What is moon?

In the night sky, the moon is just the brightest object. The moon doesn't at all produce its own light. It has no radiance. That is visible because the sun's light bounces off of it.

The rotational period of the moon is equal to the revolution period around Earth because the moon's rate of spin becomes tidally locked to its rate of revolution, it maintains the same face oriented towards the Earth In other words, every time the moon rounds the Earth, it rotates exactly once.

Therefore, the rotational period of the moon is equal to the revolution period around Earth will be correct answer.

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Which model illustrates a compound A, b, c, d,

Answers

Answer: C

Explanation: I have the same question, it’s for summit, my teacher helped me with this question :)

When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas write the balanved equation

Answers

Answer: When maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].

Explanation:

The word equation is given as maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas.

Now, in terms of chemical formulae this reaction equation will be as follows.

[tex]MnO_{2} + HCl \rightarrow H_{2}O + MnCl_{2} + Cl_{2}[/tex]

Here, number of atoms on reactant side are as follows.

Mn = 1O = 2H = 1Cl = 1

Number of atoms on product side are as follows.

Mn = 1O = 1H = 2Cl = 4

To balance this equation, multiply HCl by 4 on reactant side and multiply [tex]H_{2}O[/tex] by 2 on product side. Therefore, the equation can be rewritten as follows.

[tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex]

Hence, number of atoms on reactant side are as follows.

Mn = 1O = 2H = 4Cl = 4

Number of atoms on product side are as follows.

Mn = 1O = 2H = 4Cl = 4

Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.

Thus, we can conclude that when maganese dioxide is added to hydrogen chloride you get water maganese dichloride and chlorine gas then balanced equation is [tex]MnO_{2} + 4HCl \rightarrow 2H_{2}O + MnCl_{2} + Cl_{2}[/tex].

6. What happens when :
a)
manganese dioxide is heated with conc.
hydrochloric
acid.​

Answers

Answer:

Chlorine gas is produced

Explanation:

One of the methods of laboratory preparation of chlorine gas is to heat manganese dioxide with concentrated hydrochloric acid. The acid is oxidized by the manganese dioxide to liberate chlorine gas as follows;

MnO2(s) + 4HCl(aq) -------> MnCl2(aq) + 2H2O(l) + Cl2(g)

Hence, When manganese dioxide is heated with concentrated hydrochloric

acid, chlorine gas is liberated.

Help me Look at the pictures!!!! Past due!
Make an explanation of how my hypothesis is not supported.

Answers

Answer:

Explanation:

the temperture of the warmer water will make it have more space and have less density in the water.

can someone answer dis:
1) The atomic number of an element shows how many ___________ there are in its atoms.
thankss

Answers

I think that the answer is protons

what is a chromatogram?
please help me out
Thank you

Answers

Answer:

a visible record (such as a series of colored bands, or a graph) showing the result of separation of the components of a mixture by chromatography.

Explanation:

Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a system on which is fixed a material called the stationary phase.

Answer:

Chromatography is a technique used to separate mixture of chemical substances into its individual compounds.

Explanation:

1. Observa y completa los neutrones se encuentran ----------------- A. Girando alrededor d las orbitas B. Fuera del nucleo C. En las orbitas del nucleo D. Dentro del nucleo

Answers

Answer:

Los neutrones se encuentran dentro del núcleo.

Explanation:

Un átomo es la parte más pequeña de materia que puede combinarse químicamente con otro y mantiene todas las propiedades de un elemento.

Los átomos se combinan para formar moléculas que luego interactúan para formar sólidos, líquidos y gases.

Su estructura está compuesta por diferentes combinaciones de tres sub-partículas: los neutrones, los protones y los electrones. A su vez posee dos regiones diferentes: el núcleo, donde están los protones y los neutrones, y la nube u orbitales electrónicos, donde se encuentran los electrones.

Entonces, los neutrones se encuentran dentro del núcleo.

4.1.3 Quiz: Heat
Question 15 of 15
The sum of the kinetic energies and potential energies of all of the molecules
in a substance is called the energy of the substance.
Answer here,
SUBMIT

Answers

Answer:

Internal

Explanation:

Internal energy is the sum of kinetic and potential energies of all the molecules in a system.

A gas has a volume of 62.65 L at stp. At what temperture in C would the volume of the gas be 78.31 at a pressure of 612 mm hg

Answers

Answer:

1.79°C

Explanation:

Applying,

PV/T = P'V'/T'................. Equation 1

Where P = Initial presssure, V = Initial volume, T = Initial temperature, P' = Final pressure, V' = Final volume, T' = Final Temperature.

make T' the subject of the equation

T' = P'V'T/PV................ Equation 2

From the question,

Given: P = 760 mmHg (Standard pressure), T = 273 K (Standard temperature), V = 62.65 L, P' = 612 mmHg, V' = 78.31

Substitute these values into equation 2

T' = (612×78.31×273)/(760×62.65)

T' = 274.79 K

T' = (274.79-273) °C

T' = 1.79°C

A 25.0 L tank of nitrogen gas is at 25 oC and 2.05 atm . If the temperature stays at 25 oC and the volume is decreased to 14.5 L , what is the new pressure?

Answers

Answer:

[tex]\boxed {\boxed {\sf P_2 \approx 3.53 \ atm}}[/tex]

Explanation:

In this problem, the temperature stays constant. The volume and pressure change, so we use Boyle's Law. This states that the pressure of a gas is inversely proportional to the volume. The formula is:

[tex]P_1V_1=P_2V_2[/tex]

Now we can substitute any known values into the formula.

Originally, the gas has a volume of 25.0 liters and a pressure of 2.05 atmospheres.

[tex]25.0 \ L * 2.05 \ atm = P_2V_2[/tex]

The volume is decreased to 14.5 liters, but the pressure is unknown.

[tex]25.0 \ L * 2.05 \ atm = P_2 * 14.5 \ L[/tex]

Since we are solving for the new pressure, or P₂, we must isolate the variable. It is being multiplied by 14.5 liters and the inverse of multiplication is division. Divide both sides by 14.5 L .

[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}=\frac{P_2 *14.5 \ L}{14.5 \ L}[/tex]

[tex]\frac {25.0 \ L * 2.05 \ atm }{14.5 \ L}= P_2[/tex]

The units of liters cancel.

[tex]\frac {25.0 * 2.05 \ atm }{14.5 }=P_2[/tex]

[tex]\frac {50.25\ atm }{14.5 }=P_2[/tex]

[tex]3.53448276 \ atm = P_2[/tex]

The original values of volume and pressure have 3 significant figures, so our answer must have the same.

For the number we found, that is the hundredth place.

3.53448276

The 4 in the thousandth place (in bold above) tells us to leave the 3 in the hundredth place.

[tex]3.53 \ atm \approx P_2[/tex]

The new pressure is approximately 3.53 atmospheres.

WILL MARK BRAINLIEST
What is the oxidation state of Carbon in CaC2O4?

Answers

Answer:

The oxidation state of carbon in CaC204 is 3

Answer:The oxidation number of the carbons + the oxidation numbers of the oxygens must equal -2. Carbons + (-8) = -2 so the oxidation number of the carbons must be +6. Since there are 2 carbon atoms each must contribute +3 each. What is the oxidation number of S in Na2S2O3?

Explanation:

The oxidation state of Oxygen is -2 and that of Calcium is +2. There are four oxygen atoms which amounts to -8 charge. This leaves a charge of +6 on Carbon

PLS HELP THIS IS SCIENCE !!

IGNORE THE QUESTIONS I ACCIDENTLY PRESSED ON

Answers

Answer:

10.)14

Explanation:

MARK AS BRAINLEST!!

Answer:

where is the answer??

Please do not just take the points without answering the question.

What is the relative humidity if the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C ?

Answers

Answer:

39%

Explanation:

The Dry Bulb Temperature (also known as air temperature) is the ambient air temperature.

The Wet Bulb temperature is the temperature of adiabatic saturation.

The relative humidity is the amount of water vapor in the air. The relative humidity can be gotten from the dry bulb and wet bulb temperature. The difference between the wet bulb and dry bulb temperature as well as the dry bulb temperature is used to determine the relative humidity with the help of a Psychrometric Chart

Given that the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C. From the chart:

Relative humidity = 39%

Answer:

39% I believe is correct.

                                   

What type of reaction does this illustration represent?


A. synthesis
B. decomposition
C.single-replacement
D.double replacement

Answers

Answer: IS B

Explanation:

Decomposition

I would say the answer is A.synthesis please correct me if I’m wrong:)

Please helppppp!!! I have 10 minutes left!!!

Answers

Answer:

I think it's the ash can mix with rivers to form mudflows

Help calculate the density and please type it like this and explain how you got the answer thanks

Mass:
Volume;
Density:

Answers

Answer: 2.5

Explanation:

density= 2.5

mass= 62.5 or 62.50

volume= 25 ( 75-50= 25)

so divide 62.5( or 62.50) by 25 which will led you to 2.5

balance FeCl3 + MgO ---> Fe2O3 + MgCl2

Answers

Answer: The balanced equation is [tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex]

Explanation:

The given reaction equation is as follows.

[tex]FeCl_{3} + MgO \rightarrow Fe_{2}O_{3} + MgCl_{2}[/tex]

Here, number of atoms present on reactant side are as follows.

Fe = 1Cl = 3Mg = 1O = 1

Number of atoms on product side are as follows.

Fe = 2Cl = 2Mg = 1O = 3

To balance this equation, multiply [tex]FeCl_{3}[/tex] by 2 and MgO by 3 on reactant side. Also, multiply [tex]MgCl_{2}[/tex] by 3 on product side. Therefore, the equation can be rewritten as follows.

[tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex]

Hence, number of atoms on reactant side are as follows.

Fe = 2Cl = 6Mg = 3O = 3

Number of atoms on product side are as follows.

Fe = 2Cl = 6Mg = 3O = 3

Since, this equation contains same number of atoms on both reactant and product side. Therefore, this equation is now balanced equation.

Thus, we can conclude that the balanced equation is [tex]2FeCl_{3} + 3MgO \rightarrow Fe_{2}O_{3} + 3MgCl_{2}[/tex].

Vhat are some of the benefits and drawbacks of recycling?​

Answers

Answer:

benefits: can help reduce waste in land fills, and promotes reusability (turned into different products)

drawbacks: can be much more expensive to salvage than to just throw it in a landfill, and most of the time products cannot be recycled effectively due to its material.

Question 2(Multiple Choice Worth 2 points)
(04.06 LC)
The properties of elements can be predicted by which of the following?
Where it is on the periodic table
Where it was discovered
Its color in its natural state
Its name

Answers

Answer:

location on the periodic table

Explanation:

HELP ME PLEASEEEEE its chem
1. The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water.

2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical. Vinegar is dilute acetic acid, often produced by fermentation. The following is a reversible reaction:
CH3COOH ↔ H+ + CH3COO–
• Write the set up you would use to calculate the Ka of this reaction.
• Calculate the hydrogen ion concentration [H+] of a 0.1 M solution of acetic acid given that the dissociation constant of acetic acid is Ka = 1.8 x10–5. Work must be shown to earn credit.

3. Describe the reaction of a strong acid and a weak base. In general, what will the final pH be when the reaction between equal moles of a weak acid and a strong base is complete? Explain your answer.

Answers

Answer:The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.00 x . 2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical.Have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water.

Explanation: The thermal waters of a spring have a hydronium ion (H3O+) concentration of 2.  spring have a hydronium ion (H3O+) concentration of 2.00 x 10-6 M. Calculate the pH of the water. 2. Acetic acid (CH3COOH) is one of the simplest carboxylic acids. It is an important chemical reagent and industrial chemical.

Explain the process of fermentation.

Answers

Answer:

Fermentation, chemical process by which molecules such as glucose are broken down anaerobically. More broadly, fermentation is the foaming that occurs during the manufacture of wine and beer, a process at least 10,000 years old. The frothing results from the evolution of carbon dioxide gas, though this was not recognized until the 17th century.

Explanation:

looked it up-

Answer:

like babies or milk and cheese?

Explanation:

PLEASE HELP THIS IS SCIENCE

Answers

I'm pretty sure the answer is A.

Answer:

where is the answer??

Please do not just take the points without awnsering the question.

Are elements and compounds the same thing?

Answers

Answer:

no

Explanation:

a compound is a mixture of two or more elements while a element is by itself.

Answer:

no

Explanation:

elements are their purest form. compunds are a mix of  mutiple elements.

What is the relationship between a planet's period of rotation and diameter?

Answers

There is, however, a relationship between a planet's distance from the Sun and its period of revolution. Kepler's third law of planetary motion says that the square of the planet's orbital period is proportional to the cube of its semimajor axis.

According to Kepler's third law of planetary motion, a planet's semimajor axis and orbital period are inversely proportional.

What is Kepler's third law?

Kepler's third law is defined as the cubes of the semi-major axes of the planets' orbits are directly proportional to the squares of the planets' orbital periods. According to Kepler's Third Law, as an orbiting planet's radius increases, so does the time of its orbit around the Sun. A planet's orbits around the sun are accurately described by Kepler's third law in terms of their period and distance.

The cube (third power) of an orbital radius is directly related to the square (second power) of a planet's period (P2 = R3). The period of revolution shortens as the planet's distance from the sun rises.

Thus, according to Kepler's third law of planetary motion, a planet's semimajor axis and orbital period are inversely proportional.

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Please help me with number 43

Answers

Answer:

The reason why atomic mass is usually not a whole number is because it is a weighted average of the mass numbers of isotopes

Explanation:

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each month Leo makes copies of a budget report. when he uses both the large and small printer the job takes 30 minutes. if the small printer is broken it takes him 50 minutes. how long would the job take if the large printer were to break? please say answer now ANSWER IT HOW THE QUESTIONS ARE ASKED!! Thank you so much!! an event that cannot happen is a certainb possible c impossible Simon leans a 20 ft ladder against the side of his house so that the base of the ladder is5 ft from the house. About how high up the side of the house does the ladder reach?Round to the nearest tenth of a foot? Besides ethical considerations, what is another reason why Milgrams experiment may be difficult to duplicate? P(blue) someone plz help me How is abo most influenced by preparing meals in the islamic center? it awakens his desire to share iraqi food and customs it makes him want to become a chef. it causes him to better learn recipe ingredients it inspires him to learn from khalil's father Story is in the comments. Which excerpt from the passage best supports the authors' claim?2 What's 2 + 2? I'll give 95 points and brainliest and my first-born son. Discussion TopicMusic exists across the world. It acts as a universal language. Can you see yourself working in some sort of musical career? How might music influence your career path? Consider other people you know, as well, from family members to friends. Can you see any of them entering the music business? How might this business benefit each of these people? If any of them came to you with an interest in the music business, how would you guide them, given what you now know about music and the music business? What personality types would do the best in the music business? what are the main points of outsiders 3-5 please The temperature in San Antonio, Texas is currently 77 degrees Fahrenheit and increasing by 3 degrees per hour. The current temperature in Mumbai, India is 92 degrees Fahrenheit and dropping by 2 degrees per hour. 1. When will the temperatures be the same? 2. What will that temperature be? In this lab, you use what you have learned about searching an array to find an exact match to complete a partially prewritten C program. The program uses an array that contains valid names for 10 cities in Michigan. You ask the user to enter a city name; your program then searches the array for that city name. If it is not found, the program should print a message that informs the user the city name is not found in the list of valid cities in Michigan. The file provided for this lab includes the input statements and the necessary variable declarations. You need to use a loop to examine all the items in the array and test for a match. You also need to set a flag if there is a match and then test the flag variable to determine if you should print the the Not a city in Michigan. message. Comments in the code tell you where to write your statements. You can use the previous Mail Order program as a guide. Instructions Ensure the provided code file named MichiganCities.cpp is open. Study the prewritten code to make sure you understand it. Write a loop statement that examines the names of cities stored in the array. Write code that tests for a match. Write code that, when appropriate, prints the message Not a city in Michigan.. Execute the program by clicking the Run button at the bottom of the screen. Use the following as input: Chicago Brooklyn Watervliet Acme PLEASE ANSWER ASAP WILL MARK BRAINLIEST How do I solve these problem? Complete with imperfect: Cada lunes, t ___________ con tus amigos en el caf tropical. *1 pointcomistecomicomacomas Phototropism is a phenomenon observed in plants. Phototropism is best described as a plants response to light. Auxin is a hormone and signaling molecule found in plants that promotes cell elongation. It is observed that auxin concentrations are lower in the parts of the plant that are closest to light. Auxin concentrations are higher in the parts of a plant that are in the shade.Answer the following in the space provided.A. Describe phototropism using what you know about signal transduction. Start with auxin as a signaling molecule.B. Explain how altering the receptor would affect the signaling pathway.C. Predict how a plant would respond to exposure to light on all sides of a growing stem.D. Provide reasoning and justification for your prediction. On ___________________________________ cette chanson? Je laime beaucoup! Ma mre __________________________ un homme trange au parc hier! Il sappelait Mose. Ils ne _________________________________ pas o est notre chien. Il sest perdu au parc! Nous ____________________________ bien ce restaurant. La soupe loignon est dlicieuse! Je __________________________________ que tu vas bien aimer la soupe! Tu _______________________________ les rsultats de ton examen hier? Tu as bien fait? i need help solving this math problem from my practice work