1.
Explain what changes occur in particle motion, temperature,
and state of a pure substance when thermal energy is added
or removed.
Type your answer here
Answers
Answer:
Thermal energy is heat energy.
When it is removed, the temperature of particle decreases due to decrease in the internal energy involving that particle.
Motion of the particle decreases due to decrease in kinetic energy caused by reduction in the internal energy.
The state of the particle changes from that current state e.g liquid or gas to a solid state due to increase in the latent heat of vapourisation.
With thermodynamics we can find that by giving energy to a substance the temperature increases and after a certain value it can change from solid to liquid and vapor state
In the opposite case, as the energy of a substance decreases, the temperature decreases and goes from a gaseous state to a liquid and a solid.
Thermodynamics study the changes that substances have as their energy changes, finding macroscopic relationships such as temperature, state, pressure and volume.
The temperature of a substance is a measure of the internal energy of the particles and the thermodynamic state of a substance can be solid, liquid or gaseous depending on whether the shape and volume is maintained.
Let's analyze what happens when we increase the energy of a substance.
In this case, the particles that form has more energy, so the temperature of the substance increases, if the energy is enough to break any bonds, the substance can go from the solid state to the liquid and by continuing to increase the energy it can be break all the bonds going from the liquid to the gaseous state.
In the opposite case, when the energy of the particles decreases, it has smaller movements, therefore its temperature decreases and if some bonds are formed, the substance stops from the gaseous state to the liquid state and if the energy continues to decrease, more bonds are formed passing the liquid state to solid.
In conclusion, with the change in energy, the temperature changes in the same direction and after a certain value it can go from solid to liquid and as the temperature increases more it can go from liquid to gas.
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Related Questions
Where does the energy of a nuclear power plant come from?
A) the radiation released by unstable uranium isotopes
B) the heat energy released during nuclear fusion
C) the radiation released when hydrogen fuses into helium
D) the heat energy released during nuclear fission
Answers
Answer:
The heat energy released during nuclear fusion
The heat energy released during nuclear fusion. The correct option is D.
Thus, The Sun and other stars are powered by nuclear fusion reactions. A heavier nucleus is created when two light nuclei fuse together in a fusion reaction.
Because the mass of the resulting single nucleus is smaller than the combined mass of the two initial nuclei, the process produces energy. Remaining mass is converted to energy.
Why this happens is explained by Einstein's equation (E=mc2), which states in part that mass and energy can be transformed into one another. Fusion energy could be a significant source of energy generation if scientists can figure out how to use it in equipment on Earth.
Thus, The heat energy released during nuclear fusion. The correct option is D.
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What are the pros and cons of cloning a mammoth?
Answers
Answer:
List of Pros of Cloning
They could have a positive impact on the environment. ...
They would help us understand them better. ...
They can help us protect species that are close to extinction. ...
It makes us feel better for driving most of these species into extinction. ...
List of Cons of Cloning
We will be bringing back a species into an environment totally different from the one they lived in.
It puts the conservation of currently endangered species way back.
what pair of elements will react more violently
a chlorine and lithium
b chlorine amd potassium
c iodine and lithium
d iodine and potassium
Answers
Answer:
chlorine and potassium
Explanation:
Answer:
Chlorine and potassium
The diagram shows a homemade car being pushed with a force of 25 N. The force causes the car to move at a constant speed of 3 m/s2. What will happen if the force is changed to 35 N?
Answers
Answer:
The acceleration of the car will increase drastically
Explanation:
Based on newtons second law of motion, the force applied on a body is directly proportional to the product of its mass and acceleration;
Force = mass x acceleration
Since the mass of the car is constant, an increase in force will cause an increase in acceleration.
A decrease in the force will impact a lesser acceleration on the motor car.
This way, the change in velocity of the body per unit of time will increase drastically.
PLEASE HELP I REALLY CANT FAIL THIS. THIS DETERMINS IF I PASS MY GRADE. What are the most basic building blocks of all organisms?
OA.
blood
ОВ.
tissue
OC.
cells
OD
organs
Answers
Answer:
Cells are the basic building blocks of living things.
Explanation:
So the answer is cells because it is composed of trillions of cells, all with their own specialised function. Cells are the basic structures of all living organisms.
I hope this helps you pass and humble yourself you will get to it, you got this!!!
Answer:
Cells are the most basic building blocks
Explanation:
Tissues are made out of cells. Organs are made out of tissues.
What is the cost in dollars for the nails used to build a fence 80 meters long if it requires 30 nails per meter? There are 40 nails per box at a cost of 75 cents per box
Answers
Answer:
4500 cent
Explanation:
From the question, we were told that
a fence 80 meters long requires 30 nails per meter.
1 metre fence = 30 nails
Then 80 meters long= ( 30 × 80)
= 2400 nails
Which means a fence 80 meters long will require 2400 nails in total.
We need to find the cost in dollars for the nails to build a fence 80 meters long.
We know that 40 nails per box will cost 75 cents per box.
(2400 nails/40 nail per box)= 60 box
Then 60 box will be needed to complete the fence.
the cost in dollars for the nails to build a fence 80 meters long= (60 box × 75 cent per box)=4500 cent
which expression has a value of 10
A. (10+10)/5-3
B. (10+10)/(5-3)
C. (10+10/5)-3
D. 10+10/(5-3)
(math)
Answers
determine the hydronium ion concentration of an aqueous solution that has a pH of 4.0
Answers
Answer:
Imagewww.chem.purdue.edu › Equilibrium
Calculating the Hydroxide Ion Concentration from pOH
To calculate the pH of an aqueous solution you need to know the concentration of the hydronium ion in moles per liter ...
Calculating pH
Calculating hydronium ion ...
Calculating pOH
Calculating hydroxide ion ...
Calculating pKa
People also ask
How do you find hydronium ion concentration when given pH?
The hydronium ion concentration can be found from the pH by the reverse of the mathematical operation employed to find the pH. [H3O+] = 10-pH or [H3O+] = antilog (- pH) Example: What is the hydronium ion concentration in a solution that has a pH of 8.34? On a calculator, calculate 10-8.34, or "inverse" log ( - 8.34).
3. Which of the following items is representative of a homogeneous
mixture?
2 points
A. spaghetti & meatballs
B. cheeseburger
C. white bread dough
D. smoothie
E. Both A and B
O F. Both C and D
4. Which of the following is a chemical property of matter?
Answers
Answer: F. both c and d
Explanation:
homogeneous mixture is of same kind/phase. so the most appropriate answer we can take is smoothie and white bread dough :)
Explanation: the answer is F because a homogenous mixture can’t be taken apart or separated which in that case once bread dough is formed you can no longer take out the flour and other ingredients and same with the smoothies you’ve blended the fruit together you can’t send it to its original state
Mastering Problems
Balancing Chemical Equations (10.1)
71. Write skeleton equations for these reactions.
a. hydrogen iodide(g) → hydrogen(g) + iodine(g)
b. aluminum(s) + iodine(s) — aluminum iodide(s)
c. iron(II) oxide(s) + oxygen(g) -> iron(III) oxide(s)
Answers
a. HI(g) ⇒ H₂9g) + I₂(g)
b. Al(s) + I₂(s)⇒AlI₃(s)
c. FeO(s)+O₂(g)⇒Fe₂O₃(s)
Further explanationGiven
word equations
Required
skeleton equations
Solution
The skeleton equation shows the chemical formula of the reaction between reactants and products, regardless of the actual amount of the reacting compound (unbalanced reaction)
The skeleton equations :
a. HI(g) ⇒ H₂9g) + I₂(g)
b. Al(s) + I₂(s)⇒AlI₃(s)
c. FeO(s)+O₂(g)⇒Fe₂O₃(s)
Identify each of the following compounds as binary or ternary.
a. nickel (III) oxide
b. copper(II) iodide
c. tin(IV) nitride
d. chromium (II) bromide
e. iron (III) phosphide
f. lithium hydroxide
g. Potassium sulfate
h. Ammonium phosphide
i. Barium nitrate
j. cobalt (II) phosphate
Answers
Answer:
binary compounds have 2 different elements, and ternary compounds have 3
Nickel(III)oxide: binary, Ni2O3
Copper (II)iodide: binary, CuI2
Tin(IV) nitride: binary, Sn3N4
Chromium (II)bromide: binary, CrBr2
Iron(III)phosphide: binary, FeP
Explanation:
what type of energy warms earths surface?
A. Solar energy
B. Gravitational energy
C. Nuclear energy
D. Thermal energy
Answers
a. solar energy
the earth is warmed by the sun, which is solar (or infrared).
Determine the number of valence electrons for following (Ne) 3s2 3p4
a.3
b.2
c.4
d.7
e.16
f.6
Pls help
Answers
Answer:
F. 6
Explanation:
Which is the greater mass?0.007960 grams or 0.7960 mg?
Answers
Answer: milligrams
Explanation:
Because 0.007960 = 1.75487961e-5 pounds
And 0.7960= 1.75488e-6
The reaction below will occur in a gaseous system at STP:
6 NO (g) + 4 NH3 (g) —> 5 N2 (g) + 6 H20 (g)
What volume of nitrogen gas will be produced from 15.0 L of nitrogen monoxide gas?
12.5 L
18.0L
15.0 L
22.5 L
Answers
Answer:
V = 12.5 L
Explanation:
Given data:
Volume of NO = 15.0 L
Temperature and pressure = standard
Volume of nitrogen gas produced = ?
Solution:
Chemical equation:
6NO + 4NH₃ → 5N₂ + 6 H₂O
Number of moles of NO:
PV = nRT
n = PV/RT
n = 1 atm × 15.0 L / 0.0821 atm.L /mol.K × 273.15 K
n = 15.0 atm.L / 22.43 atm.L /mol
n = 0.67 mol
now we will compare the moles of No and nitrogen gas.
NO : N₂
6 : 5
0.67 : 5/6×0.67 = 0.56
Volume of nitrogen gas:
PV = nRT
1 atm × V = 0.56 mol × 0.0821 atm.L /mol.K × 273.15 K
V = 12.5 atm.L / 1 atm
V = 12.5 L
A gas was at STP. If the pressure increased to 3.5 atm, what would the new
temperature be?
Answers
Answer:
T₂ = 956.0 K
Explanation:
Given data:
Initial temperature = 273.15 K
Initial pressure = 1 atm
Final pressure = 3.5 atm
Final temperature = ?
Solution:
According to Gay-Lussac Law,
The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.
Mathematical relationship:
P₁/T₁ = P₂/T₂
Now we will put the values in formula:
1 atm / 273.15 K = 3.5 atm / T₂
T₂ = 3.5 atm ×273.15 K / 1 atm
T₂ = 956.0 atm. K / 1 atm
T₂ = 956.0 K
Which of the following measurements are required to find the work done on an object?
1. The mass and volume of the object
2. The volume of the object and the distance the object moved
3. The force exerted on the object and the distance the object moved
4. The force exerted on the object and the time it took to move the object
Answers
Answer:
1.p=mV................
21) What is the volume (inL) of 3470 g of liquid glycerol, which has a density of 1.26 g/?
Answers
Answer:
V = 2.75 L
Explanation:
Given that,
Mass of liquid glycerol, m = 3470 g
The density of liquid glycerol, d = 1.26 g/cm³
We need to find the volume of liquid glycerol.
We know that,
Density=mass/volume
[tex]V=\dfrac{m}{d}\\\\V=\dfrac{3470\ g}{1.26\ g/cm^3}\\\\V=2753.96\ cm^3[/tex]
We know that, 1 cm³ = 0.001 L
V = 2.75 L
So, the volume of liquid glycerol is 2.75 L.
what are the uses of glycerin?
Answers
Explanation:
This medication is used as a moisturizer to treat or prevent dry, rough, scaly, itchy skin and minor skin irritations (e.g., diaper rash, skin burns from radiation therapy). Emollients are substances that soften and moisturize the skin and decrease itching and flaking.
15 grams of hydrogen and 7.5 grams of oxygen were placed in a beaker. An explosion happened inside the baker that produced water. The beaker was never opened. How many grams of water were produced?
Answers
Answer:
16.8768 g
Explanation:
The reaction that takes place is:
2H₂ + O₂ → 2H₂OFirst we convert the mass of hydrogen and oxygen into moles, using their respective molar masses:
H ⇒ 15 g ÷ 1 g/mol = 15 mol HO ⇒ 7.5 g ÷ 16 g/mol = 0.4688 mol OThere are significantly less oxygen moles than hydrogen moles, so oxygen is the limiting reactant.
We calculate the produced moles of water, using the moles of the limiting reactant:
0.4688 mol O * [tex]\frac{2molH_2O}{1molO_2}[/tex] = 0.9376 mol H₂OFinally we convert water moles into grams, using its molar mass:
0.9376 mol H₂O * 18 g/mol = 16.8768 gWhich evidence shows that heat is given off when a candle burns?
A. A match is used to light the candle.
B. The burning candle produces a yellow flame.
O c. Covering the burning candle extinguishes the flame.
D. Solid candle wax near the flame melts as the candle burns.
thing
Answers
Answer:
D. solid candle wax near the flame melts as the candle burns.
Answer:
Part D, melting is a product of heating
Explanation:
Why are bubbles and color changes not always chemical change?
Answers
What is the asthenosphere?
Question 3 options:
The hot, rigid inner part of the upper mantle which can’t flow
The hot, weak inner part of the upper mantle which can flow
The hot, weak outer part of the lower mantle
None of the above
Answers
Answer:
None of the Above
Explanation:
The Athenosphere is able to flow but is also part of the UPPER LAYER meaning none of these choices are correct
Metals in general have:
a. High electrical conductivity
b. High thermal conductivity
c. High density
d. All of the above
Answers
Answer:
d. All of the above
Explanation:
Which type of molecule is shown below?
A. Alcohol
B. Ester
C. Amine
D. Ketone
Answers
Answer:
Ketone molecule
Explanation:
The type of molecule shown above is ketone molecule.
What is molecule?A molecule is a group of two or more atoms that are chemically combine together or are tightly held together by attractive forces.
What is ketone?A ketone is an organic compound in which the carbonyl group is attached to a carbon atom within the carbon chain. The general formula for a ketone is RC(=O)R' where R and R' are alkyl or aryl groups.Hence, we can conclude that option D is the answer.
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In every chemical reaction that produce energy, ____ react with ________ ?
Answers
Answer:
Acid reacts with water?
Explanation:
Name the following compound with a polyatomic ion: Na₂SO₄ *
Answers
Answer:
sodium sulfate
Explanation:
For naming an ionic compound with polyatomic anion, the metal is written first using its element name followed by name of the polyatomic anion. Therefore, the compound with Na+Na+ cation and SO2−4SO42− anion is named as sodium sulfate.
What is the difference between the Lewis model and the valence-shell electron pair repulsion (VSEPR) model?
A.
Only the Lewis model shows the covalent bonds in a molecule.
B.
Only the VSEPR model can be used to explain intermolecular forces.
C.
Only the Lewis model takes into account unbonded electrons.
D.
Only the VSEPR model shows the geometric shape of a molecule.
Answers
Answer: only the VSEPR mode shows the geometric shape of a formula.
226
) Which equation represents the radioactive decay of Ra?
88
Answers
Answer:
A
Explanation:
The study of a chemical is called chemistry.
The correct answer is A
Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive.
The radioactive of the Ra is option A that is:-
[tex]RA^{226}_{88}----->Rn^{222}_{86} +He^4_2[/tex].
During the decomposition, the element is breakdown into the neutron, proton, and electron.
Hence, the correct answer is A.
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Define chemical reaction
Answers
Answer:
a process that involves rearrangement of the molecular or ionic structure of a substance, as distinct from a change in physical form or a nuclear reaction.
A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products.
hope this helps ^^