Question #e3d46

1 Answer
Jun 29, 2016

Answer:

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.