A gas expands in a piston-cylinder device from 0.01m^3 to 0.03m^3. The pressure and volume during the process are described by the relationship P=aV^-1+b, where P is in bar and V is in m^3, a and b are constants
If a= 0.060 bar-m^3 and the measured work done by the gas on the piston is 0.106 bar-m^3 evaluate "b" and specify it's units