How many joules are released when 30.0 g of H2O(g) condenses at 100°C and cools to 10°C

Answers

Answer 1

Heat released : 79086 J

Further explanation

Condenses :

1. phase change (gas - liquid) : heat of vaporization (ΔH vap for water = 2260 J/g)

2. cools from 100 - 10 : (Q=m.cΔT)

1. Q=m.ΔH vap

[tex]\tt Q=30\times 2260=67800~J[/tex]

2. Q=mc.ΔT(c water = 4.18 J/g C)

[tex]\tt Q=30\times 4.18\times (100-10)\\\\Q=11286~J[/tex]

Q tot = 67800 + 11286 = 79086 J


Related Questions

When does a phyisical change occur?

Answers

Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.

Please hurry i really need it fast

The answers are here

In which figure does Colin do work?

A. Figure A
B. Figure B
C. Both figures
D. Neither figure

Answers

Neither figures!!!! D

A car is traveling with velocity of 40 m/s and has a mass of 1120 kg. The car has __________ energy.

A. Kinetic

B. Potential

Answers

Answer:

A.

Explanation:

The car has kinetic energy.

A fish swimming in water uses its fins to push the water backward, making 2 points
it swim forward. This is an example of Newton's
law of motion. *

Answers

Answer:

Newton's third law

Explanation:

A fish swimming uses its fins to push the water backward making it swim forward is obeying Newton's third law of motion.

Newton's third law of motion states that "action and reaction are equal and opposite".

When the fish uses its fin to push the water backward, it reacts by being propelled in the opposite direction which is in the forward sense.

The third law is clear indicator that forces are always in pairs. As the fish swims, a net force between the oppositely directed forces do not cancel out.

Can anyone help? The instructions are in bold.

Answers

Answer:rarrrrrrr

Explanation:

A gas occupies 1.56 L at 1.00 atm. What will be the volume of this gas if the pressure becomes 3.00 atm?

Answers

Answer:

0.52 L

Explanation:

The new volume of the gas can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new volume

[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]

From the question we have

[tex]V_2 = \frac{1.56 \times 1}{3} = \frac{1.56}{3} \\ [/tex]

We have the final answer as

0.52 L

Hope this helps you

A glass of unsweetened lemonade has a mass of 255 grams. A spoonful of sugar is massed before stirring It Into the lemonade and you find that
It has a mass of 25 grams.
• How much mass will the sweetened lemonade have once you stir in the sugar?
• State and explain the science concept that leads you to this answer.

Answers

Answer:

270

Explanation:

Once you add more mass to something the mass doesn’t go away you add more mass.

hope this helps!

Adaptations can only arise if
there is _______ within a species.

Answers

Answer:

Diversity?

Explanation:

Think thats bio

1. Place the molecules in the list in order with the smallest molecules at the top and the largest molecules at the bottom.

= glucose molecule

= starch molecule

= protein molecule

= carbon dioxide molecule

= water molecule

= amino acid molecule

= oxygen molecule

Answers

Answer:

Explanation:

In creating this list, one will have to start from the atom (which is the smallest in the list) to the giant polymer (which is the largest in the group). The arrangement below will also be based on there molecular weight.

oxygen molecule (this is the first because it is an atom)

water molecule (this is lighter in weight than carbon dioxide)

carbon dioxide

amino acid molecule (most amino acids have a lesser molecular weight than glucose)

glucose (has a molecular weight of 180.156 g/mol)

protein molecule (several proteins have a lesser molecular weight than starch)

starch molecule (has a molecular weight of 359.33 g/mol)

The arrangement of molecules in the ascending order is: oxygen, water, carbon dioxide, amino acid, glucose, starch, and protein.  

• The size of the molecules can be determined by knowing their molecular weights.  

• The sum of the atomic weights of the atoms in the molecule is known as the molecular weight of the molecule.  

• The molecular weight of water is 18 gram per mole, glucose 180.2 g/mol, starch 360 g/mol, carbon dioxide 44 g/mol, protein 20000 g/mol, amino acid for example glycine 75 g/mol, and oxygen 16 g/mol.  

Thus, the molecules can be arranged with the smallest to the largest as oxygen, water, carbon dioxide, amino acid, glucose, starch, and protein.

To know more about:

https://brainly.com/question/19922822

PLEASE HELP WITH CHEMISTRY !! WILL GIVE BRAINLIEST AND 10 POINTS

Answers

Wavelength  = 6.25 x 10⁻¹⁰ m

Energy=3.1805 x 10⁻¹⁶ J

Further explanation

Radiation energy is absorbed by photons

The energy in one photon can be formulated as

[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]

Where

h = Planck's constant (6,626.10⁻³⁴ Js)

f = Frequency of electromagnetic waves

f = c / λ

c = speed of light

= 3.10⁸

λ = wavelength

Frequency : 4.8 x 10¹⁷ /s

the wavelength  :

[tex]\tt \lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3.10^8}{4.8.10^{17}}=6.25\times 10^{-10}~m[/tex]

Energy :

[tex]\tt E=6.626.10^{-34}\times 4.8\times 10^{17}=3.1805\times 10^{-16}~J[/tex]

Sorry,for table 3 , I can't find it

Which statement is best supported by the information in the chart?

Atom X will donate electrons to Atom Y.
Atom X will accept electrons from Atom Y.
Atom Y will accept electrons from Atom Z.
Atom Z will donate electrons to Atom X.

Answers

Answer:

B

Explanation:

Because , it is the answer .

Based on the information provided in the chart, the statement that is best supported is Atom X will donate electrons to Atom Y. Option A is the correct answer.

Atom X has 6 valence electrons, which means it has 6 electrons in its outermost energy level. Atom Y has 2 valence electrons, indicating that it has 2 electrons in its outermost energy level. In a chemical reaction, atoms tend to either donate or accept electrons to achieve a stable electron configuration. Option A is the correct answer.

Atom X has more valence electrons than Atom Y, suggesting that it is more likely to donate electrons. Since Atom Y has fewer valence electrons, it is more likely to accept electrons from Atom X. Therefore, based on the number of valence electrons, Atom X will donate electrons to Atom Y in order to achieve a stable electron configuration.

Learn more about Atom here:

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#SPJ2

Which half-reaction correctly describes an oxidation?
Upper C a (s) plus 2 e superscript minus right arrow upper C a superscript 2 plus (a q).
Upper B r subscript 2 plus 2 e superscript minus right arrow 2 upper B r superscript minus.
Upper N a superscript plus (a q) right arrow upper N a (s) plus e superscript minus.
Upper C r (s) right arrow upper C r superscript 3 plus (a q) plus 3 e superscript minus.

Answers

Answer: The Answer was D. These people trolling. Look at the attachments I put on

Explanation:

An oxidation half reaction is one in which electrons are lost. Hence the reaction, Cr^3+(aq) ----> Cr(s) + 3e is an oxidation reaction.

What is oxidation?

The term oxidation has to do with the loss of electrons. When an oxidation half reaction takes place, a specie loose electrons. We will now look out for the reaction in which electron loss takes place.

Now, in option D, the reaction is Cr^3+(aq) ----> Cr(s) + 3e. Three electrons where lost here hence this is an oxidation half reaction.

Learn more about oxidation: https://brainly.com/question/9496279?

PLEASE HELP ME WITH THIS CHEM WORK!!!
I’LL GIVE A BRAINIEST TO WHOEVER GETS IT RIGHT:)


1.) 50.0 grams of water at 100 degrees Celsius evaporated to water vapor 2 points
at 100 degrees Celsius. Calculate the amount of heat required for this
conversion.

2.) A student measured 15.0 grams of ice in a beaker. The beaker was then
placed on a hot plate where it was heated uniformly for a certain amount
of time. During the melting process of the ice, the student noted that the
temperature was at 0 degree Celsius. When all the ice converted to water,
the final temperature was also at 0 degree Celsius. How much heat was
used to melt the ice?

Answers

1. Q = 112.8 kJ

2. Q = 5.01 kJ

Further explanation

The heat to change the phase can be formulated :

Q = mLf (melting/freezing)

Q = mLv (vaporization/condensation)

Lf=latent heat of fusion

Lv=latent heat of vaporization

1. m=50 g=0.05 kg

Lv for water = 2256 kJ/kg

[tex]\tt Q=m.L_v\\\\Q=0.05\times 2256\\\\Q=\boxed{\bold{112.8~kJ}}[/tex]

2. m=15 g=0.015 kg

Lf for water = 334 kj/kg

[tex]\tt Q=m.L_f\\\\Q=0.015\times 334\\\\Q=\boxed{\bold{5.01~kJ}}[/tex]

what polyatomic ion could form a neutral compund with the manganese

Answers

Answer:

The polyatomic cation that will react with MnO₄⁻ to form a neutral compound is NH₄⁺ (ammonium ion) to form NH₄MnO₄ (Ammonium permanganate).

A gas occupies 11.2 liters at 0.860 atm. What is the pressure if the volume becomes 15.0 L? (Boyle)

Answers

Answer:

0.642 atm

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_1V_1 = P_2V_2[/tex]

Since we are finding the new pressure

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

From the question we have

[tex]P_2 = \frac{11.2 \times 0.86}{15} = \frac{9.632}{15} \\ = 0.64213333...[/tex]

We have the final answer as

0.642 atm

Hope this helps you

Given:

Initial Volume [tex] \sf (V_1) [/tex] = 11.2 L

Initial Pressure [tex] \sf (P_1) [/tex] = 0.860 atm

Final Volume [tex] \sf (V_2) [/tex] = 15.0 L

To Find:

Final Pressure [tex] \sf (P_2) [/tex]

Concept/Theory:

[tex] \bf{ \underline{Boyle's \: Law} \: (Pressure - Volume \: Relationship)}[/tex]

"At constant temperature, the pressure of a fixed amount of gas varies inversely with the volume of the gas."

[tex] \bf{P \propto \dfrac{1}{V} \: (at \: constant \: T \: and \: n)}[/tex]

It can be also stated as "At constant temperature, the product of pressure and volume of fixed amount of a gas remains constant."

[tex] \bf{PV = Constant}[/tex]

If the initial pressure and volume of a fixed amount of gas at constant temperature are [tex] \sf (P_1) [/tex] & [tex] \sf (V_1) [/tex] and final pressure of the gas is [tex] \sf (P_2) [/tex] and volume occupied is [tex] \sf (V_2) [/tex], then according to Boyle's law;

[tex] \bf{P_1V_1 = P_2V_2 = Constant}[/tex]

OR

[tex] \bf{\dfrac{P_1}{P_2} = \dfrac{V_2}{V_1}}[/tex]

Answer:

By using Boyle's Law, we get:

[tex] \rm \longrightarrow \dfrac{0.860}{P_2} = \dfrac{15.0}{11.2} \\ \\ \rm \longrightarrow P_2 = \dfrac{11.2}{15.0} \times 0.860 \\ \\ \rm \longrightarrow P_2 = \dfrac{9.632}{15.0} \\ \\ \rm \longrightarrow P_2 = 0.642 \: atm[/tex]

[tex] \therefore [/tex] Final Pressure [tex] \sf (P_2) [/tex] = 0.642 atm

1. Raw egg to boiled egg.
2. Batter to idli.
3. Wet clothes to dry clothes.
4. Woollen yarn to knitted
sweater.
5. Grain to its flour.
6. Cold water to hot water.
7. Straight string to a coiled string.
8. Bud to flower.
9. Milk to Cheese.
10. Cowdung to biogas.
II. Ice cream to melted ice-cream.
12. Stretched rubber band to
its normal size.
13. Souring of milk.
14. Ripening of a mango.
15. Dissolving sugar in water.

these are reversible or Irreversible, chemical or physical, Natural or manmade, periodic or non periodic,desirable or undesirable?​

Answers

Answer:

This is man made and natural

In which medium will a sound wave move more quickly?

Ethanol, air, vacuum, rock.

Answers

Answer:

Rock

Explanation:

The heat of fusion of a metal is 7.62 J/g at its freezing point of 592°F. How much energy is required to melt 257 g of this metal (already in 592°F)?

Answers

Answer:

7.62 plug into the equation for freezing

0= 592/7.62x x 90

0 = 77.69x x 90

x=0

therefore according to balton's law, it is required to have 0 + 27.222222222 (balton's number) to get the energy required.

answer is 27.222222 rounded 27. cheers.

Question
Select all the correct answers.
Which statements are true about all waves?
It’s caused by a disturbance.
It requires a medium to travel.
It carries energy.
It carries matter.

Answers

Answer:

It’s caused by a disturbance.

It carries energy.

Explanation:

A wave is a disturbance that transmits energy from one point to another. It does no necessarily carry the particles or matter of the medium.

Waves usually carries energy. It is this energy they use in creating disturbances.

Not all waves carries matter; a good example is electromagnetic waves. Also, electromagnetic waves do not require a medium for propagation.

Witch object would be attracted by a magnet?

Answers

Answer:

Any type of Ferromagnetic metals a quick and easy example is a nail made out of iron, where as a penny made out of zinc and copper both of them being non magnetic.

Explanation:

Which of the following can best be described as speed plus direction?A: AccelerationB: DecelerationC: FrictionD: Velocity

Answers

Answer:

D

Explanation:

Because speed is a scalar quantity which he has only magnitude and no direction while velocity is a vector quantity because it has both magnitude and direction.

In this unbalanced chemical equation, which element is not conserved?

3LIOH + H3PO4 Li PO4 + 3H20


A. O
B. H
C. P
D. LI

Answers

Answer:

LI

Explanation:

There is three Li in the start but One Li after

I NEED HELP!! PLEASE


what is the predicted order of electronegativity values from least to greatest for elements in the second period?

A. li b>n>f
B. c b>n>f
D. there is no way to predict

Answers


C < N < O < F.
Electronegativity values decrease from top to bottom within a group of elements.
Hope this helps

Carbon dioxide and ____ are outputs of cellular respiration

Answers

Answer:

oxygen

Explanation:

plants use oxygen

Explain in words or using your diagrams how beryllium atoms would react with fluorine atoms.
Show clearly the outcome of the reaction and state the formula.

Answers

Explanation:

To delineate the the nature of the bonds that would be formed between the two elements, let us first write the electronic configuration of the two species;

  Be  = 2, 2

  F  = 2, 7

 Beryllium is a metal with two valence electrons whereas fluorine is a halogen with seven valence electrons.

When Be loses two electrons it becomes isoelectronic with He;

                 Be →  Be²⁺ + 2e⁻  

Also, when fluorine gains  an electron, it becomes isoelectronic with Ne;

               F  + e⁻ →  F⁻

This loss and gain of electrons between the two elements creates an electrostatic attraction them and they enter into an electrovalent bond.

      Hence;

           Be²⁺  + 2F⁻ → BeF₂

How does the mass of an atom effect the amount a charged atom gets deflected?

Answers

i have no clue i hope you get your answer tho

A wavelength is the___
of one ____ ____

Answers

Answer:  A wavelenghth is the distance between successive crests of one wave.


A hypothesis .........

Answers

Answer:

all of the above

Explanation:

a hypothesis is indeed the second step. it also can be tested since you made it beforehand. it also is supposed to be educated. so all of the above.

Answer:

All of the above

Explanation:

PLS I NEED HELP!! Lucia wants to arrange the four states of matter from lowest kinetic energy to highest kinetic energy. How should she arrange them?


A. liquid, solid, plasma, gas

B. liquid, solid, gas, plasma

C.solid, liquid, plasma, gas

D. solid, liquid, gas, plasma

Answers

Answer:

Basically, the more hot the state is, the more kinetic energy it will have. This means that answer D. would be right, as it goes from coldest to hottest states!

Answer:

The answer is D. solid, liquid, gas, plasma

Explanation:

Kendrick goes to his neighborhood gym to exercise. The process of cellular respiration makes it possible for him to run on the treadmill and to lift weights. What do Kendrick's cells do during cellular respiration?


A.His cells convert kinetic energy into chemical energy.


B.His cells use oxygen to break down food molecules to release energy.


C.His cells absorb light energy through the chlorophyll in their chloroplasts.


D.His cells combine water and carbon dioxide to produce oxygen and glucose.

Answers

Answer:

i think it is B

Explanation:

His cells use oxygen to break down food molecules to release energy.

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