# Problem: For ammonia (NH3), the enthalpy of fusion is 5.65 kJ/mol and the entropy of fusion is 28.9 J/K•mol.a. Will NH3(s) spontaneously melt at 200. K?

###### FREE Expert Solution

Now that we have ΔH˚rxn and ΔS˚rxn, we can now solve for ΔG˚rxn

The given temperature is 200 K.

$\overline{){\mathbf{\Delta G}}{{\mathbf{°}}}_{{\mathbf{rxn}}}{\mathbf{=}}{\mathbf{\Delta H}}{{\mathbf{°}}}_{{\mathbf{rxn}}}{\mathbf{-}}{\mathbf{T\Delta S}}{{\mathbf{°}}}_{{\mathbf{rxn}}}}$

###### Problem Details

For ammonia (NH3), the enthalpy of fusion is 5.65 kJ/mol and the entropy of fusion is 28.9 J/K•mol.

a. Will NH3(s) spontaneously melt at 200. K?