(a) Object A and object B are at different initial temperatures when they are placed in a thermally Insulated container and allowed to reach thermal equilibrium as shown in Figure 5. Object A has a mass of 7 kg; object B has a mass of 3 kg. Given the specific heat of object A Is 500 in J / kg . K. Determine the specific heat of object B, in J / kg . K. (5 marks) 100 T(C) 60 20 0 10 20 1 (min) Figure 5 (b) A gas within a closed chamber undergoes the cycle shown in Figure 6. The horizontal scale is set by Vs = 8 m'. Calculate the net energy added to the system as heat during one complete cycle. (5 marks) 10 30 Pressure (N/m=) 20 10 Volume (m) Figure 6