Physics - Heat & Thermo Question with Solution | TestHub

A vertical cylinder of cross-section $2\times 10^{-3}$ $m^2$ holds one mole of an ideal diatomic gas under a piston of mass 3 kg. Outside pressure is $10^5$ Pa. A heater supplies 50 J/s to the gas and the pressure stays constant. Find the speed of the piston in mm/s (nearest integer, $g=9.8$ m $s^{-2}$).