Question

The heat of fusion of a compound is 126 Joules

per gram. What is the total number of Joules of
heat that must be absorbed by a 15.0-gram
sample to change the compound from solid to
liquid at its melting point?

Answer 1

1.89 × 10³ J

Step-by-step explanation:

Step 1: Given data

• Heat of fusion (ΔH°fus): 126 J/g

• Mass of the sample (m): 15.0 g

Step 2: Calculate the heat (Q) required to melt the sample

The fusion is the phase change from solid to liquid. We can calculate the heat required for the fusion of the sample using the following expression.

Q = ΔH°fus × m

Q = 126 J/g × 15.0 g

Q = 1.89 × 10³ J