Answer:
The amount of thermal energy required to melt 15.2 grams of solid paraffin is 2.62 kJ
Explanation:
The question asks the amount of heat energy to melt 15.2 g of solid paraffin wax
Molar mass of paraffin = 282.62 g/mol
[tex]Number \ of \ moles = \frac{Mass \ of \ paraffin \ wax}{Molar \ mass \ of \ paraffin} = \frac{15.2 \ grams}{282.62 \ grams/mol} = 0.05378 \ moles[/tex]
Molar heat of fusion of paraffin wax = 48.78 kJ/mol
Therefore, the heat energy required to melt the 15.2 g of paraaffin wax is given by the following relation;
48.78 kJ/mol × 0.05378 moles = 2.6235 kJ ≈ 2.62 kJ
The amount of thermal energy required to melt 15.2 grams of solid paraffin = 2.62 kJ.
