Chap. 14: Energy in Thermal Processes Solids, liquids or gases have internal energy Kinetic energy from random motion of molecules translation rotation vibration At equilibrium, it is related to temperature Heat: transfer of energy from one object to another as a result of their different temperatures Thermal contact: energy can flow between objects Physics 121: Lecture 25, Pg 2Physics 121: Lecture 25, Pg 2 Chap. 14: Energy in Thermal Processes Solids, liquids or gases have internal energy Kinetic energy from random motion of molecules translation, rotation, vibration At equilibrium, it is related to temperature Heat: transfer of energy from one object to another as a result of their different temperatures Thermal contact: energy can flow between objects T1 T2 U1 U2 >