A cylinder closed by a piston contains N moles of a diatomic gas characterised by U = (5/2) NRT and by pV = NRT, as in exercise 4.1. The gas has a temperature T when it is brought in contact with a heat reservoir at temperature T_ext, causing an irreversible process to occur. The pressure p of the gas is equal to the constant pressure p_ext of the environment at all times, i.e. p = p_ext = const. Determine the amount of heat exchanged. 

Numerical application:

Data from in Exercise 4.1

Transcribed Image Text:

N = 0.5 mol, T = 450 K and Text = 300 K.