How many grams of benzene, C 6 H 6 , can be melted with 39.8 kJ of heat energy? The molar heat of fusion of benzene is 9.95 kJ/mol.

310.94 grams of benzene.

Explanation:

Q = mL

Q is quantity of heat energy required to melt benzene = 39.8 kJ

MW of benzene (C6H6) = 78 g/mol

L = specific latent heat of fusion of benzene = molar heat of fusion × MW = 9.95 kJ/mol × 1 mol/78 g = 0.128 kJ/g

m = Q/L = 39.8 kJ/0.128 kJ/g = 310.94 g

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