Thermochemistry

Question

Acetone (molar mass of 58.08 g/mol) is a common industrial solvent and has a heat of vaporization of +31.3 kJ/mol. If 1.0g of acetone is spilt, how much energy (in J) will it absorb as it vaporizes? Give the quantity and unit (e.g. 3.5 cm).

Answer 1

1.0 g acetone x 1 mol/58.08 g = 0.0172 moles acetone

0.0172 moles x 31.3 kJ/mol = 0.539 kJ = 0.54 kJ (2 significant figures)