Calculate the work performed when 2 moles of hydrogen expand isothermally and reversibly at 25ºC from 15 to 50 litres.

 

A gas absorbs 200J of heat and expands against the external pressure of 1.5 atm from a volume of 0.5 litre to 1.0 litre, Calculate the change in internal energy-

 

The internal energy of one mole of a gas is

 

A system does 100J work on surroundings by absorbing 150J of heat. Calculate the change in internal energy-

 

A sample of gas is compressed by an average pressure of 0.50 atmosphere so as to decrease its volume from 400 cm^3 to 200 cm3^.During the process 8.00 J of heat flows out to surroundings. Calculate the change in internal energy of the system.