Question

When water is cooled from 2oC to ice at -2oC, how many distinct calculations must be made to determine the change in the heat for the system?

Answer 1

Answer: we need three distinct calculations

Explanation: The first one is that the heat energy released when the water is cooled to 0"c.

The second one is that the heat energy released when water changes its state to solid at constant temprature.

The third one is the heat energy released when the ice at 0'c is changed to -2'c.