A quantity of 4.0 moles of an ideal gas at 20^(@)C expands isothermally against a constant pressure of 2.0 atm from 1.0 L to 10.0L. What is the entropy change of the system (in cals)?

A quantity of 4.0 moles of an ideal gas at 20^(@)C expands isothermall

1.	A quantity of 4.0 moles of an ideal gas at 20^(@)C expands isothermally against a constant pressure of 2.0 atm from 1.0 L to 10.0L. What is the entropy change of the system (in cals)?
Answer» Solution :Expansion against constant pressure means the process is IRREVERSIBLE `Delta S = nR l N (V_(2))/(V_(1)) = 4 xx 2 l n (10)/(1) = 18.424` CAL