PH 122 Chapter Notes - Chapter 18: Thermal Insulation, Thermal Energy, Pressure Measurement
Document Summary
Chapter 18 temperature, heat, and the first law of. If bodies a and b are each in thermal equilibrium with a third body t, then a and b are in thermal equilibrium with each other: the zeroth law of thermodynamics, measuring temperature, the triple point of water. We select a standard fixed point and give it a standard fixed-point temperature. In a triple-point cell, solid ice, liquid water, and water vapor coexist in thermal equilibrium. By international agreement, the temperature of this mixture has been defined to be 273. 16 k. the bulb of a constant-volume gas thermometer is shown inserted into the well of the cell: the constant-volume gas thermometer. It consists of a gas-filled bulb connected by a tube to a mercury manometer. By raising and lowering reservoir r, the mercury level in the left arm of the u- tube can always be brought to the zero of the scale to keep the gas volume constant.
