__Work-done during adiabatic expansion is given by (where p1 v1, T1 = Pressure, volume and temperature for the initial condition of gas, p2, v2, T2 = Corresponding values for the final condition of gas, R = Gas constant, and γ = Ratio of specific heats)__

• A. (p1 v1 - p2, v2)/(≈í‚â• - 1)
• B. [m R (T1 - T2)] /(≈í‚â• - 1)
• C. [m R T1/(≈í‚â• - 1)][1 - (p2, v2 /p1 v1)]
• D. All of these