A sample of argon gas at `1` atm pressure and `27° C` expands reversibly and adiabatically from `1.25 dm^3` to `2.50 dm

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Q 2616256170.     A sample of argon gas at `1` atm pressure and `27° C` expands reversibly and adiabatically from `1.25 dm^3` to `2.50 dm^3` Calculate the enthalpy change in this process `C_(V_m)` for argon is `12.49 JK^(-1) mol^(-1)`.
JEE 2000

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