Topic: Thermodynamics
Joule-Thomson coefficient for an ideal gas is
- A. higher than zero
- B. less than zero
- C. zero
- D. 1
Answer: C. zero
Explanation: The Joule-Thomson coefficient ($\mu$) represents the rate of change of temperature with respect to pressure during a throttling process (constant enthalpy). For a perfect ideal gas, enthalpy is a function of temperature only. Since enthalpy remains constant during throttling, the temperature also remains constant, resulting in a Joule-Thomson coefficient of strictly zero.