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Laws of Thermodynamics
GATE 2012
Medium
In a throttling process, the pressure of an ideal gas reduces by 50%. If CP and CV are the heat capacities at constant pressure and constant volume, respectively (γ=CP/CV), the specific volume will change by a factor of
- 2
- B2^(1/γ)
- C2^((γ−1)/γ)
- D0.5
Explanation
For an ideal gas, enthalpy depends on temperature alone, so an isenthalpic throttling process leaves T unchanged (zero Joule-Thomson coefficient). With v=RT/P and T constant, halving P doubles v.
Source: GATE CH 2012 (2012)
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