Thermal Physics

Question 1

For boyles law, draw a graph of pressure against volume. Draw two graphs with one v having a higher temperature

Answer 1

Question 2

Derive Boltzmann equation from ideal gas equation

Answer 2

Question 3

State use of equation that links work done, pressure and volume

Answer 3

Energy needed/ released is area under graph

Question 4

What are the 5 ideal gas laws in molecular kinetic theory

Answer 4

1. Total volume of each molecule is negligible compared to the total volume of the gas
2. The intermolecular forces between molecules are negligible
3. Time between collisions with container walls and other molecules is much greater than the duration of collisions
4. Collisions between container walls and other molecules are considered elastic
5. There are a large number of molecules who’s motion is random

Question 5

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Question 6

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Question 7

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Question 8

What does average velocity equal to

Answer 8

Crms
Start with square, then mean, then square root

Question 9

How do you calculate total kinetic energy of a gas

Answer 9

Number of molecules x average kinetic energy of a molecule

Question 10

What is internal energy

Answer 10

Question 11

Define specific heat capacity

Answer 11

Specific heat capacity is energy needed to raise temperature of 1kg of a substance by 1 Kelvin

Question 12

How else can you write Q=mc x delta t, get rid of Q in terms of Pressure

Answer 12

P is power not pressure

Question 13

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Question 14

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Question 15

Define the Avogadro constant

Answer 15

Number of atoms in 12 grams of carbon-12

Question 16

Outline what is meant by an ideal gas

Answer 16

Question 17

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Question 18

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Question 19

Answer 19

Kinetic energy is exchanged in molecular collisions
Until average kinetic energy of all molecules is the same

Question 20

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Question 21

Skip calculation part, as long as you get equation needed correct

Answer 21

Question 22

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Question 23

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Question 24

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Question 25

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Question 26

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Question 27

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Question 28

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Question 29

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Question 30

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Question 31

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Question 32

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Question 33

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Question 34

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Question 35

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