PHYS 1501Q Chapter Notes - Chapter 26: Melting Point, Pisto, Triple Point

• School: UConn
• Department: Physics
• Course: PHYS 1501Q
• Professor: Diego Valente

Document Summary

Helium gas is in an insulated container, sealed airtight by a cold piston. A force pushes the cold piston downwards yf. F piston, gas = f gas, piston yf. A = cross sectional area of piston. Work done on the piston by the gas yf. Suppose volume does not change yf yi. = 0 (no work is done by the gas) There can be a heat change because of the molecules colliding with each other. If the temperature of the piston temperature of the gas. Heat from the gas will flow to the piston until thermal equilibrium. Heat from the gas will flow to the piston until they reach the same temperature. When t gas, final = t piston, final = t equilibrium is maximized. Derivative of entropy with respect to internal energy. Heat flows from substance with small (at constant volume) ds du to big ds du so that total entropy of system will increase.