In the given figure, an ideal gas changes its state from state A to state C by two paths ABC and AC. The internal energy of the gas at A is 10 J and amount of heat supplied to change its state to C through the path AC is 2003. Calculate the internal energy at C.

In the given figure, an ideal gas changes its state from state A to st

1.	In the given figure, an ideal gas changes its state from state A to state C by two paths ABC and AC. The internal energy of the gas at A is 10 J and amount of heat supplied to change its state to C through the path AC is 2003. Calculate the internal energy at C.
Answer» Solution :As work done `W= int PDV`= AREA under P-V CURVE, so According to first law of THERMODYNAMICS dQ=dU+dW `(U_c -U_A ) =dQ-dW =200- 40160 J` ` soU_c= 160+U_A= 160+ 100= 170 J`