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If the heat of fusion is 32.2 KJ/mol, what is the amount of heat energy required to melt 5.67 grams of FeO?

Solution:

5.67 grams of FeO = 5.67 / (55.85+16) = 0.0789 mol

q = delta H fus x m = 32.2 x 0.0789 = 2.54 KJ