Under which condition should the approximate approach rather than the exact appr

Question

Under which condition should the approximate approach rather than the exact approach be used when dealing with specific heats?

a) The working fluid behaves as an ideal gas and the change in temperature between states is large.

b) The working fluid behaves as an ideal gas and the change in temperature between states is small.

c) The working fluid behaves as an ideal gas and the temperature difference is unknown.

d) The working fluid behaves as an ideal gas and the process occurs at or near room temperature.

e) Either approach can be used with the same accuracy as long, as the working fluid does not undergo a phase change.

Explanation / Answer

The working fluid behaves as an ideal gas and the change in temperature between states is small then  approximate approach rather than the exact approach can be used when dealing with specific heats because specific heat varies with temperature and if change is small then there will be negligible change in specific heat.

so option b is correct.

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