What is the energy associated with the phase transition of a #2311*g# block of ice at #0# #""^@C# to WATER at the SAME TEMPERATURE?

Question

1697 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2016-08-21T12:27:26

You did not quote the latent heat of fusion for ice, but it is #333.55*J*g^-1# from this site, https://en.wikipedia.org/wiki/Enthalpy_of_fusion

We want to estimate the energy change for the following phase change:

#H_2O(s) + Delta rarr H_2O(l)#

Luckily, we don't have to bother with heat capacities, inasmuch as reactants and products are at the same temperature.

#Delta=333.55*cancelJ*cancel(g^-1)xx2311*cancelgxx10^-3kJ*cancel(J^-1)#

#=# #??kJ#

How would the answer differ if we had been asked to assess the amount of energy transferred in the reverse transition:

#H_2O(l) rarr H_2O(s)#