Question

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

Answer 1

Step 1 of 5

Consider the system as piston cylinder device.

Apply first law and find the heat transfer.

 …… (1)

Here,  is heat transfer in piston cylinder device,  work transfer, and  is change in internal energy.

Find the work done during the constant pressure process in piston cylinder device.



Here, n is number of moles, P is pressure and  is change in volume.

Find the change in internal energy.