The molar heat of fusion of sodium metal is 2.60 kJ/mol, whereas its heat of vaporization is 97 kJ/mol. 1. What quantity of heat would be needed to melt 1.00 g sodium at its normal melting point? 2. What quantity of heat would be needed to vaporize 1.00 g sodium at its normal boiling point? 3. What quantity of heat would be evolved if 1.00 g sodium vapor condensed at its normal boiling point?

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