# 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?

Aug 21, 2016

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

#### Explanation:

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

${H}_{2} O \left(s\right) + \Delta \rightarrow {H}_{2} O \left(l\right)$

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

$\Delta = 333.55 \cdot \cancel{J} \cdot \cancel{{g}^{-} 1} \times 2311 \cdot \cancel{g} \times {10}^{-} 3 k J \cdot \cancel{{J}^{-} 1}$

$=$ ??kJ

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

${H}_{2} O \left(l\right) \rightarrow {H}_{2} O \left(s\right)$