What is the final temperature of the calorimeter if 0.870 g of dimethylphthalate (C10H10O4) is combusted in a calorimeter whose heat capacity is 7.65 kJ/°C at 21.5 °C? (?Hcomb = -4685 kJ/mol)
a) 21.5 °C
b) 22.8 °C
c) 23.6 °C
d) 24.1 °C