Calculate the amount of heat energy required to evaporate 55.0 g of water at 100.0ºC. (molar heat of vaporization of liquid water = 4.07 × 10⁴ J/mol)

Question

Quizplus · Accepted Answer

To calculate the heat energy required to evaporate 55.0 g of water at 100.0ºC, use the formula: Heat energy = mass (in moles) × molar heat of vaporization. First, convert the mass of water to moles (55.0 g / 18.015 g/mol = 3.05 mol). Then, multiply by the molar heat of vaporization (3.05 mol × 4.07 × 10^4 J/mol = 1.24 × 10^5 J or 1.24 × 10^2 kJ).

Calculate the Amount of Heat Energy Required to Evaporate 55