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1 mole of an ideal gas A(C(v.m)=3R) and ...

1 mole of an ideal gas `A(C_(v.m)=3R)` and 2 mole of an ideal gas B are `((C_(v,m)=(3)/(2)R)` taken in a container and expanded reversible and adiabatically from 1 litre of 4 letre starting from initial temperature of 320 K. `DeltaE ` or `DeltaU` for the process is :

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