Chap. 15: the Laws of Thermodynamics 0)If two objects are in thermal equilibrium with a third, they are in equilibrium with each other 1) There is a quantity known as internal energy that in an isolated system always remains the same 2) There is a quantity known as entropy that in a closed system always remains the same(reversible)or increases(irreversible) Physics 121: Lecture 25, Pg 11
Physics 121: Lecture 25, Pg 11 Chap. 15: the Laws of Thermodynamics 0) If two objects are in thermal equilibrium with a third, they are in equilibrium with each other. 1) There is a quantity known as internal energy that in an isolated system always remains the same. 2) There is a quantity known as entropy that in a closed system always remains the same (reversible) or increases (irreversible)
Zeroth Law of Thermodynamics Thermal equilibriun when objects in thermal contact cease U heat transfer same temperature If objects a and B are separately in thermal equilibrium with a third object C, then objects a and b are in thermal equilibrium with each other C A B Physics 121: Lecture 25, Pg 12
Physics 121: Lecture 25, Pg 12 Zeroth Law of Thermodynamics Thermal equilibrium: when objects in thermal contact cease heat transfer same temperature T1 T2 U1 U2 = If objects A and B are separately in thermal equilibrium with a third object C, then objects A and B are in thermal equilibrium with each other. A C B