Physics - Heat & Thermo Question with Solution | TestHub

For air $C_v=0.177$ cal $g^{-1}$°$C^{-1}$. Suppose that air is confined to a cylinder by a movable piston under a constant pressure of 3.0 atm. How much heat must be added to the air if its temperature is to be changed from $27^{\circ }$C to $400^{\circ }$C? The mass of air in the cylinder is 20 g and its original volume is 5860 $c{m}^3$.