Laws of Thermodynamics Flashcards
1
Q
Zeroth Law
A
If two bodies are in thermal equilibrium with a third body, they are in thermal equilibrium with each other
2
Q
First Law
A
Energy is always conserved, cannot be made or destroyed.
Q - W = delta U
Q = heat
W = Worl
U = internal energy
3
Q
Second Law
A
Heat always flows from a warmer body to a cooler body.
4
Q
Kelvin-Planck statement
A
No heat engine can have a thermal efficiency of 100%. It is a limitation.
5
Q
Claussius Statement
A
There will always be work input to refrigerators and heat pumps.
Because; impossible to construct a device that operates in a cycle and produces no effect than to transfer heat from a low temp body to a high temp body.
6
Q
Third Law
A
A system at absolute 0 temperature has 0 entropy.
