Heat of vaporization

[collegelife101]

---

Members don't see this ad.

Perspiration is important in maintaining normal body temperature. Compared to water at its boiling point, which of the following is true about water at normal human body temperature?

Two of the options were:
More energy is required for gas expansion
The heat required for vaporization is higher

I'm mainly confused as to why the first answer choice is incorrect.

Thank you!

 

[blackmi4]

I think it is a trick question.

What they are getting at is that no matter what phase the 2 identical species starts in, once they are in the gas phase, they require an equal amount of energy to expand.

Don't regard the energy it took to get water in the body from below BP to BP temperature.