How do I solve for work output by knowing the wattage of a light bulb and how long power is provided to it?

Question

Also, how do I solve for thermal energy by knowing the energy input, the heating up and vaporization of a known
amount of water. Is there a specific equation? I can't seem to find one, so any help will by very appreciated!

Answer 1

Sounds like just some units conversion.

Watts is Joules/sec , Energy/time

So, watts x time = energy

to vaporize water you need to raise its temperature to the boiling point and then put in energy to vaporize it. You need thermal capacity of water and the heat of vaporization

and then just conserve energy!