Thermal Physics Flashcards
1
Q
Internal Energy of a System, U
A
This is the sum of the KE and PE of the particles of a system
2
Q
Heat, Q
A
Energy flow from a region at higher temperature to a region of lower temperature due to the temperature difference. In thermodynamics we deal with heat going into or out of a system
3
Q
Work, W
A
If the system is a gas, in a cylinder fitted with a piston, the gas does work of amount pV when it exerts a p and pushes the piston out a small way, so the gas volume increases by delta V
4
Q
First law of thermodynamics
A
The increase, delta U, in internal energy of a system is U=Q-W, in which Q is heat entering the system and the work is done by the system
5
Q
Specific heat capacity
A
The heat required (per kg) per degree or kelvin to raise the temperature of a substance
