Question

In which labeled portion of the curve would you use the heat of vaporization to calculate the heat absorbed? (image attached inside!)
1, 2, 3, 4, or 5

**not sure :( Thank you!!

Answer 1

In the labeled portion of the curve ,you use the heat of vaporization to calculate the heat absorbed in the 4th portion. It is indicated in the picture that it is the region where vaporization occurs, that is why you need to consider this portion to calculate.