Thermal physics

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10 Terms

1
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Define internal energy

The sum of the kinetic energies and potential energies of the particles in a body.

2
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What occurs during a change of state?

The potential energies are changing but not the kinetic energies.

3
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State the combined gas law.

P1V1/T1 = P2V2/T2

4
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State Charles’ Law.

V1/T1 = V2/T2

5
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State Boyle’s Law.

P1V1 = P2V2

6
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Describe Brownian motion.

The erratic random movement of microscopic particles in a fluid.

7
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Define an ideal gas.

Internal energy is kinetic energy of the atoms.

8
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What are the 5 ideal gas model assumptions?

  1. negligible volume compared to container

  2. collisions are elastic

  3. no intermolecular forces

  4. obeys Newton’s laws of motion

  5. random and continuous motion

9
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What is the formula for pressure?

Force/ Area

10
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What is the kinetic theory model used for?

Explains the motion of particles in different states