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A sample of argon gas at 1atm pressure a...

A sample of argon gas at `1atm` pressure and `27^@C` expands reversibly and adiabatically from `1.25dm^3` to `2.5dm^3`. Calculate the enthalpy change in the process. Given that `C_(v(m))` for `Ar` is `12.45JK^(-1)mol^(-1)` and antilog `(0.199)=1.58`.

A

+114.43Joules

B

-114.43Joules

C

-1144.3Joules

D

-11.443Joules

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • A sample of argon gas at 1 atm pressure and 27^(@) C expand reversibly and adibatically from 1.25 dm^(3) to 2.50 dm^(3) . The enthalpy change in this process will be C_(v.m.) for argon is 12.48 JK^(-1)mol^(-1) .

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