Question

In which labeled portion of the curve would you use the heat of
fusion to calculate the heat absorbed?
A. 1
B. 2
C. 3
D. 4

Answer 1

Answer: B. 2

Explanation:

The heat of fusion occurs when a solid turns into a liquid form. One the curve, this occurs at the first instance plateau on the heat curve. If you notice there is a horizontal arrow above the second region indicating that the element is turning from solid to liquid.

Therefore, B is correct!