Tutorial 7 You start with 1200 g of a solid substance. As you add thermal energy, the temperature changes as shown in the diagram. 310 D 300 290 280 B Temperature (K 270 C 260 250 O 50000 550000 150000 100000 200000 450000 400000 500000 600000 350000 250000 300000 Energy () 1. What is happening between points A and B? What is the heat capacity? What is the mass specific heat? 2. Between Points B and C, what is going on with the substance? 3. Between points C and D, what is the heat capacity and what is the mass specific heat