a piston cylinder$-$like device contains mass$=\mathrm{.}33$ kg of air. initially the air has a pressure $=100$ kpa and $300$ K$.$ The air is then heated until the volume triples; during this time the piston can freely move. After the volume is tripled, the piston is locked in place and no longer moves. the air is heated once more until it reaches a temperature of $1100$ K$.$ the total amount of heat added for this two$-$step process is closest to$?$