constant pressure gas thermometer problem delta h

In Section 5 we introduce the second law of thermodynamics, and show how processes ranging from bench–top experiments to the evolution of the universe can be described in terms of entropy changes.

In Section 4 we take a look at phase changes represented on a PVT-surface, and identify the triple point and the critical point. We also investigate the related ratio of specific heats for an ideal gas, and investigate its dependence on the number of atoms in each molecule of a gas, and its role in describing adiabatic processes. We deal first with constant volume and constant pressure processes and derive expressions for the corresponding principal specific heats of a monatomic ideal gas. In Section 3 attention turns to gases, where different constraints are readily applied during heating. We finish the section by outlining some techniques for measuring specific heats and latent heats. Next we discuss fusion, vaporization, sublimation and latent heats. We begin, in Section 2, by defining important some important terms, using them to discuss the heating of solids and liquids, and seeing how the temperature rise of a heated body is related, via the specific heat capacity, to the heat transferred.

We also look more generally at the problem of converting heat into useful work, and the related issue of the irreversibility of many natural processes. In this module we discuss the heating of solids, liquids and gases under a variety of conditions. What happens when a substance is heated? Its temperature may rise it may melt or evaporate it may expand and do work – the net effect of the heating depends on the conditions under which the heating takes place.

Constant pressure gas thermometer problem delta h