MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryThermodynamics and ThermochemistryPrevious Year Questions
The correct option for free expansion of an ideal gas under adiabatic condition is. (NEET 2020)
A.q = 0, ∆T = 0 and w = 0✓ Correct
B.q = 0, ∆T < 0 and w > 0
C.q < 0, ∆T = 0 and w = 0
D.q > 0, ∆T > 0 and w > 0
Explanation
For free expansion of an ideal gas, Pex = 0, w = –Pex∆V = 0 For adiabatic process, q = 0 According to first law of thermodynamics, ∆U = q + w = 0 As internal energy of an ideal gas is a function of temperature, ∆U = 0, ∴ ∆T = 0
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