# Latent Heat Question

**1. The problem statement, all variables and given/known data**

A scientist heats up a substance by applying heat at a constant rate of 75 J/s. She measures that

it takes 1 minute for 100 grams of the substance to evaporate. What is the latent of vaporization

of this substance? If she starts with 1 kg of the substance, how long will it take for it to

evaporate and how much energy will it take to evaporate the substance?

**2. Relevant equations**

Q=mL?

[b]3. The attempt at a solution[/b

I’m not really sure how to use Q=mL. Does 75 J/s go into Q or is Q the total amount of joules. I know m is the mass and L is the specific latent heat.

http://ift.tt/1ifaQr9

## Leave a comment