First Law - Closed Systems Example Problems

Try to solve the problems before watching the solutions in the screencasts.

Example Problem 1

Calculate the final conditions for the adiabatic reversible compression of an ideal gas. The initial conditions are given below: 

Example Problem 2

An ideal gas goes from state 1 (T1, P1) to state 2 (T2, P2) by two processes. Process A has 50 kJ of work done on the gas and is reversible. Process B has 200 kJ of work done on the gas and is irreversible. In one process heat is added and in the other heat is removed. For which process is heat added? Explain your answer.