# Question #2a1c5

##### 1 Answer

Since you didn't provide an initial temperature for the water, I'll show you how to calculate the energy needed to boil water at

The enthalpy of vaporization, or *latent heat of vaporization*, is the heat you need to provide to a mole of water to convert it from liquid at

To boil **1 mole** of water at **40.67 kJ** of heat - this amount of heat will cause one mole of water to undergo a phase change.

Determine how many moles of water you're dealing with by using water's molar mass

The heat needed to boil this much water will be

Rounded to two sig figs, the number of sig figs given for 150 g, the answer will be