The optimum drinking temperature for a shiraz is 15. 0 ∘c. A certain bottle of shiraz having a heat capacity of 3. 40 kj∘c−1 is 23. 1 ∘c at room temperature. The heat of fusion of ice is 6. 02 kj mol−1 and the heat capacity of ice is 2. 108 jg−1∘c−1. Assume that no heat is lost to the rest of the surroundings.