How much energy is needed to melt 25.4 grams of l2

0.7824 KJ

Explanation:

Given data:

Mass of iodine = 25.4 g

Amount of heat required to melt = ?

Solution:

The heat of fusion of iodine is 7.824 Kj /mol

Number of moles of iodine = 25.4 g/ 254 g/mol

Number of moles of iodine = 0.1 mol

The amount of heat required to melt one mole of iodine is 7.824 Kj /mol

For 0.1 mol;

7.824 Kj /mol × 0.1 mol

0.7824 KJ

the answer is true.