Question

. The molar heat of vaporization of acetone, C3H6O, is 30.3 kJ/mol at its boiling point. How many kilojoules of heat would be liberated by the condensation of 5.00 g of acetone?

Answer 1

2.61 kilojoules of heat would be liberated by the condensation of 5.00 g of acetone

Explanation:

To convert grams into moles

$moles = grams \times \frac{1 mole}{grams}$

We have 5.00 g acetone

$moles = 5 \times \frac{1}{58.1}$

$moles = 0.0861$

Heat liberated = moles $\times$ heat of vapourization

                         =0.0861 mol x 30.3 kJ/mol

                        = 2.61 kJ

Therefore, 2.61 kilojoules of heat would be liberated by the condensation of 5.00 g of acetone