To calculate the enthalpy of vaporization for water, we can use the following formula:q = n * Hvapwhere q is the heat absorbed during vaporization, n is the number of moles of water, and Hvap is the heat of vaporization of water.First, we need to find the number of moles of water. The molar mass of water H2O is 18.015 g/mol. n = mass / molar massn = 50.0 g / 18.015 g/moln 2.776 molesNow, we can use the heat of vaporization of water 107 kJ/mol to find the heat absorbed during vaporization.q = n * Hvapq = 2.776 moles * 107 kJ/molq 297 kJSo, the enthalpy of vaporization for 50.0 g of water at its boiling point 100C is approximately 297 kJ.