Refer to the temperature versus time graph (Figure 2) when answering the questions in Parts C through F. A system consists of 250 g of water. The system, originally at TA = 21.0 oC, is placed in a freezer, where energy is removed from it in the form of heat at a constant rate.
The figure shows how the temperature of the system takes t1 =10min=600s to drop to 0oC, after which the water freezes. Once the freezing is complete, the temperature of the resulting ice continues to drop, reaching temperature TB after an hour. The following specific heat and latent heat values for water may be helpful.
How much energy must be transferred out of the system as heat Q to lower its temperature to 0oC?
