## Info

100 200 300 400 500 600 700 800 900100011001200 Temperature (*K) —

100 200 300 400 500 600 700 800 900100011001200 Temperature (*K) —

### FIGURE 2.7 The heat capacity of copper.

Below a few hundred degrees Celsius, CP and Cv are practically equal. Using the methods to be discussed in Chapter 8, the general relation between the heat capacities is:

The small values of a and v for condensed phases account for the proximity of CP and Cv At high temperatures, however, the two heat capacities diverge significantly, as shown in Figure 2.7.

An Incompressible solid (or liquid) is one for which j3 = <», which, according to Equation (2.19), renders CP - Cv This is a common approximation for most condensed plates.

A first-law application utilizing the heat capacity of a solid is given in Problem 2.3. ## Getting Started With Solar

Do we really want the one thing that gives us its resources unconditionally to suffer even more than it is suffering now? Nature, is a part of our being from the earliest human days. We respect Nature and it gives us its bounty, but in the recent past greedy money hungry corporations have made us all so destructive, so wasteful.

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