Question

Question #e3d46

Answer 1

It might be an idea to state the question. It might also be an idea to listen to your teacher.

Explanation:

Your teacher's explanation was complicated because the problem involves 1 phase change, and 2 heat capacities. There is no simple way to solve this question and we must calculate stepwise the enthalpy change associated with the following transiions:

(i) Water as a liquid is cooled from `100.0` `""^@C` to `0.0` `""^@C`

(ii) Water undergoes a phase transition at `0.0` `""^@C` from liquid to ice.

(iii) Ice is cooled from `0.0` `""^@C` to `-18.4` `""^@C`

All of these processes may be separately calculated, given the appropriate thermodynamic quantities, and we need 3 of them, which you have not provided. I advise you to go back to your notes and follow your teacher's explanation.