# Module 4 Thermal Physics Basics

- Created by: Aoife
- Created on: 15-01-13 23:23

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- Thermal Physics
- Boyle's Law : The pressure of a fixed mass of gas is inversely proportional to to its volume if the temperature is constant.
- Pressure Law: The pressure of a fixed mass of gas is directly proportional to it's temperature in Kelvin provided the volume is constant.
- Charles' Law: The volume of a fixed mass of gas is directly proportional to the temperature in Kelvin provided the pressure is constant.
- PV/T = constant
- Depends on mass of gas
- For 1 mole, R = 8.31Jmol^-1K^-1

- Depends on mass of gas
- pV = nRT
- pV = 1/3 Nm <c^2>
- p = 1/3Nm<c^2> / V
- p = 1/3xdensityx<c^2>

- p = 1/3Nm<c^2> / V
- The Boltzman Constant = R/NA = k = 1.38x10^-23JK^-1
- Average molecular kinetic energy where m=mass 1 molecule 1/2m<c^2> = 3/2kT
- Q=m x c x change in temperature

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