How many joules of heat are needed to completely vaporize
Of water at its boiling point?
Given
= 40.6 kJ/mol

Question

How many joules of heat are needed to completely vaporize 
Of water at its boiling point?
Given 
= 40.6 kJ/mol

Quizplus · Accepted Answer

To completely vaporize water at its boiling point (100°C), we need to supply the heat of vaporization, which is 40.6 kJ/mol. The molar mass of water is approximately 18 g/mol. Therefore, to vaporize one gram of water, we need 40.6 kJ/18 g = 2.26 kJ/g. For 11 g of water, we need 11 × 2.26 kJ = 24.86 kJ, which is closest to option B (25 kJ).

How Many Joules of Heat Are Needed to Completely Vaporize