In an adiabatic expansion of a gas initial and final temperatures are\ – McqOptions

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1.	In an adiabatic expansion of a gas initial and final temperatures are\[{{T}_{1}}\] and \[{{T}_{2}}\] respectively, then the change in internal energy of the gas is [MP PET 1997]
A.	\[\frac{R}{\gamma -1}({{T}_{2}}-{{T}_{1}})\]
B.	\[\frac{R}{\gamma -1}({{T}_{1}}-{{T}_{2}})\]
C.	\[R({{T}_{1}}-{{T}_{2}})\]
D.	Zero
Answer» B. \[\frac{R}{\gamma -1}({{T}_{1}}-{{T}_{2}})\]

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