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A 100 kg piston encloses 32 g of oxygen gas at a temperature of 27^(@)C in a vertical cylinder of hose area of 4 dm^(2). The air pressure outside is 1xx10^(5)Pa. The axis of the cylinder is vertical, and the piston can moves in it without friction. How much heat is to be transferred to the gas to raise the piston by 20cm from rest . positon? ("Use" R=(25)/(3)J//"mol"-k) |
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Answer» 3000J `V=(nRT)/(P)` `H=(V)/(A)=(2xx10^(-2))/(4xx10^(-2))=(1)/(2)m` `T_(2)-(T_(1))/(T_(1))=(DELTAH)/(h)` `DeltaQ=nC_(p)(T_(2)-T_(1))` |
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