Chapter 15. Temperature and volume for ideal gas, adiabatic process (15-23)

Question

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Question

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Question

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Question

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Review

The value of g is greater than 1 for all gases (see Table 15-1), so \(\gamma - 1\) is greater than zero. So as volume increases in an adiabatic expansion, temperature decreases; as volume decreases in an adiabatic compression, temperature increases.

Equation 15-23 explains what happens when you use a bicycle pump to inflate a tire: The pump rapidly becomes warm to the touch. Although the pump is not made of an insulating material, the air in the pump cylinder is compressed so rapidly that there’s no time for heat to flow into or out of the air during the compression. As a result the compression is adiabatic, so the temperature of the gas (and the pump that holds it) increases as the air is compressed.