A sample of Argon gas at 1 atm pressure and 27°C expands reversibly and adiabatically from 1.25 dm3 — AITS & Test Series Chemistry Question

Question

A sample of Argon gas at 1 atm pressure and 27°C expands reversibly and adiabatically from 1.25 dm3 to 2.5 dm3. Calculate the enthalpy. Change in this process. Cvm for Argon is 12.48 Jk–1mol–1 (A) –114.52 J (B) –110.32 J (C) –100.42 J (D) –126.42 J