Question

The heat of fusion of a substance is 80 J/g. How much energy is required to melt 25 g of the substance?

Answer 1

2000J

Step-by-step explanation:

Given parameters:

Heat of fusion = 80J/g

Mass of substance = 25g

Unknown:

Amount of energy required to melt the given mass = ?

Solution:

To solve this problem, the amount of energy required to melt the substance is given as;

H = m L

m is the mass

L is the heat of fusion

Insert the given parameters and solve;

H = 25 x 80 = 2000J