Question

When 20.0 grams of a substance is completely melted at its melting point, 820 Joules are absorbed, what is the heat of fusion of this substance?

Answer 1

Answer: Heat of fusion of this substance is 41 J/g

Step-by-step explanation:

Latent heat of fusion is the amount of heat required to convert 1 g of solid to liquid at atmospheric pressure.

It is given that amount of heat required to melt 20 gram of a substance= 820 J

Heat required to melt 20 g of a substance= 820 J

Thus Heat required to melt 1 g of a substance=
`(820)/(20)* 1=41J`

Thus heat of fusion of this substance is 41 J/g