# Question #b91ab

##### 1 Answer

#### Explanation:

The problem essentially wants you to convert a given amount of energy to grams of steam at *conversion factor*.

This conversion factor is called the **enthalpy of vaporization** of water

#DeltaH_"vap" = "2257 J g"^(-1)#

http://www.engineeringtoolbox.com/fluids-evaporation-latent-heat-d_147.html

The enthalpy of vaporization tells you how much heat is needed in order to convert

In your case, you need

This means that

#"226,000" color(red)(cancel(color(black)("J"))) * "1 g"/(2257color(red)(cancel(color(black)("J")))) = color(darkgreen)(ul(color(black)("100. g")))#

The answer is rounded to three **sig figs**, the number of sig figs you have for the amount of heat.