Task 3: Consider a system that is taken along the paths shown in the Figure 3.1. The internal energy of the system at A and at C is 30 kJ and 95 kJ respectively. Pressure / Pa O с 6 X 10% 2 x 10 A B Volume / m 0.02 0.05 Fig. 3.1 (a) Calculate the internal energy of the system at point B, if 21 kJ of heat is absorbed by the system in going from A to B. (b) Find the amount of heat that enters the system along the path from B to C.