Question

A substance has a heat of fusion of 155 J/g. How many joules of energy are required to be removed in order to freeze a 10.0 g sample?

Answer 1

1550J

Explanation:

Given parameters:

Heat of fusion = 155J/g

Mass of sample = 10g

Unknown:

Quantity of heat removed to freeze the substance =?

Solution:

This is a phase change problem and we apply the formula for the specific heat of fusion to solve the problem:

                 Q = mL

   m is the mass of the substance

   L is the specific heat of fusion of the substance.

We then plug the parameters into the equation:

                Q = 155J/g  x 10g = 1550J

Learn more:

specific heat https://brainly.com/question/7210400

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