Achieve HW Week 5/6 Q#7

[Ruby 1l]

Throwback question! I have been trying to figure out this problem for quite a while and can't seem to get it right. Can anyone explain how to find the delta H values? I understand how to find delta S but can find it without delta H.

[Sofia Woodward 2G]

Delta H is the kj of energy supplied by the heater divided by moles of the compound that was vaporized (find difference between initial and final masses)