Thermodynamics

Chapter 15

Figure 15-1An ideal gas in a cylinder fitted with a movable piston.

- PV=nRT. If n, R, and T are constant, then PV=k- What type of mathematical relationship exists between P & V?- Sketch a plot of P vs. V.

Define these terms:(If you know what each term

means, you should be able to compare/contrast!)

• Isobaric• Isochoric• Adiabatic• Isothermal• Isovolumetric

Figure 15-22Problem 10

Figure 15-3PV diagram for adiabatic (AC) and isothermal (AB) processes on

an ideal gas.

Figure 15-4(a) Isobaric ("same pressure") process. (b) Isovolumetric ("same

volume") process.

Figure 15-6PV diagram for different processes where the system changes from

A to B.

Figure 15-11Schematic diagram of energy transfers for a heat engine.

Figure 15-15Diagram of an impossible perfect heat engine in which all heat

input is used to do work.

Figure 15-16Schematic diagram of energy transfers for a refrigerator or air

conditioner.

Figure 15-17Typical refrigerator system

Figure 15-18A heat pump uses an electric motor to "pump" heat from the cold

outside to the warm inside of a house.