A frictionless piston-cylinder device and a rigid tank contain 3 kmol of an ideal gas at the same temperature, pressure and volume. now heat is transferred, and the temperature of both systems is raised by 10°c. the amount of extra heat that must be supplied to the gas in the cylinder that is maintained at constant pressure is.

Explanation:

Extra heat can be determine by the work needed in the piston cylinder system.

= PΔV

          = mRΔT

          = ΔT

           = nR*ΔT

∵ R is the gas constant its value is 8.31447 J/mol.K

           = 3×8.31447×10          

           =249.43 KJ

So the extra heat that must be supplied to the gas is 249.43 KJ.

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