Question

How much energy is required to melt a 500. gram block of iron? The heat of vaporization is 6090 J/g and the heat of fusion is 247 J/g.

3.05x10 6 J
2.47x10 2 J
1.23x10 5 J
6.09x10 3 J

Answer 1

Heat required = 1.23×10⁵J

Step-by-step explanation:

Given:

Mass (m) = 500 gram

Specific heat = 6,090 J/g

heat of fusion = 247 J/g.

Find:

Heat required

Computation:

Heat required = 247 J/g× 500 g

Heat required = 1.23×10⁵J