# Latent Heat of Fusion/Vaporization

pcs106

## Homework Statement

Heat is added to a 1.0-kg solid sample of a material at 200 °C. The figure shows the temperature of the material as a function of the heat added.
http://edugen.wiley.com/edugen/courses/crs1445/art/qb/qu2/c12/r3-1.jpg

What is the latent heat of fusion of this material?
What is the latent heat of vaporization of this material?

## Homework Equations

I know that Q = mL equation applies to this concept, but not sure how to go about it

## The Attempt at a Solution

Q = 100kcal?
m = 1
L=Q/m = 100/1 = 100 for fusion?

## Answers and Replies

Homework Helper
The latent heats occur during a phase change, so when the temperatures are constant.

pcs106
The latent heats occur during a phase change, so when the temperatures are constant.

so the latent heat of fusion is 100 kcal? or at the beginning of the constant: 50kcal?

Homework Helper
so the latent heat of fusion is 100 kcal? or at the beginning of the constant: 50kcal?
yes it looks like the fusion is 100 kcal, the vaporization would be in the other region.