Chapter 1, Problem 1.65P

A freezer compartment is covered with a 2-mm-thicklayer of frost at the time it malfunctions. If thecompartment is in ambient air at 20°C and a coefficientof $h=\text{2}{\text{W/m}}^{\text{2}}\cdot \text{K}$ characterizes heat transfer by naturalconvection from the exposed surface of the layer, estimate the time required to completely melt the frost.The frost may be assumed to have a mass density of $700{\text{Kg/m}}^{\text{3}}$ and a latent heat of fusion of 334 kJ/kg.