1. The problem statement, all variables and given/known data A certain mass of a diatomic gas (gamma=1.4) occupies a volume of 100 cm^3 at a pressure of 75 cm of Hg. It is compreseed adiabatically until the pressure increases to 80 cm of Hg. Calculate the workdone in the process. 2. Relevant equations W=1/(gamma -1)* (p1v1-p2v2) =nR/(gamma-1)*(t1-t2) where gamma=cp/cv cp=molar specific heat of the gas at constant pressure cv=molar specific heat of the gas at constant volume. 3. The attempt at a solution i tried the formula and got -10 J but the correct answer is 29.2 J and i dont have a clue of the method.