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Two moles of an ideal monoatomic gas occ...

Two moles of an ideal monoatomic gas occupies a volume V at `27^(@)C`. The gas expands adiabatically to a volume 2V. Calculate (a) the final temperature of the gas and (b) change in its internal energy.

A

189 K (b) -2.7 kJ

B

195 K (b) 2.7 kJ

C

189 K (b) 2.7 kJ

D

195 K (b) -2.7 kJ

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