10 J of heat is provided to a balloon filled with gas The ba

10 J of heat is provided to a balloon filled with gas. The balloon expands producing 5 J of work
against the atmosphere. Calculate the change in internal energy of the gas and the balloon

Solution

10 joules of heat is given to system , and 5j is used in doing work , so according to the first law of thermodynamics U=Q+W, so 10-5 =5 joules is net internal energy change