Physics 52 - Heat and Optics Dr. Joseph F. Becker Physics Department San Jose State University © 2003 J. F. Becker

Chapter 16 Thermal Properties of Matter © 2003 J. F. Becker San Jose State University Physics 52 Heat and Optics

Fig A hypothetical apparatus for studying the behavior of gases. The pressure p, volume V, temperature T, and number of moles n, of a gas can be varied and measured.

Fig Cutaway of an automobile engine. While the air- gasoline mixture is being compressed prior to ignition, the intake and exhaust valves both are in the closed (up) position.

Fig Isotherms, or constant-temperature curves, for a constant amount of ideal gas. p = nRT / V

Fig pV diagram for a non-ideal gas, showing isotherms for temperatures above and below the critical temperature Tc.