Calculate the enthalpy change that occurs when 1.00 kg of acetone condenses at its boiling point (329.4 K) .The standard enthalpy of vaporization of acetone is29.1 kJ.mol^-¹. A) -502 kJ B)-29.1 kJ C) -2.91 * 10⁴ kJ D) +502 kJ E) +29.1 kJ

Question

Quizplus · Accepted Answer

The enthalpy change for condensing acetone can be calculated using the molar mass of acetone (58.08 g/mol) and the given standard enthalpy of vaporization (29.1 kJ/mol). Since 1.00 kg of acetone is 1000 g, the number of moles is 1000 g / 58.08 g/mol = 17.22 mol. The enthalpy change is then 17.22 mol * 29.1 kJ/mol = 501.1 kJ, which rounds to 502 kJ. The process is exothermic, so the sign is negative, making the correct answer -502 kJ.

Calculate the Enthalpy Change That Occurs When 1