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?

1.89 × 10³ J

Explanation:

Step 1: Given data

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

the molecules move in straight line until they collide with each other or with the walls of the container. collisions are perfectly elastic; when two molecules collide, they change their directions and kinetic energies, but the total kinetic energy is conserved.

explanation:

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