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

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Q 1107180988.     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. Find the enthalpy change in this process. C_v for argon is 12.49 JK^-1 mol^-1.
A

– 116.4 J

B

116.4 J

C

139.6 J

D

– 139.6 J

#### HINT

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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