If I put a cup of water in an oven proof container and boil it in an oven at 400 degrees, and then do it with an oven at 500 degrees,
Will the hotter oven evaporate the water faster?
My thought is it will all evaporate at 212 but the hotter oven would make it to 212 faster. Aside from that, would a hotter temp make it happen faster if all other things were equal?
In: Chemistry
Water needs on average 4.2 kilojoules per kilogram to raise the temperature by 1 degree Celcius between freezing and boiling.
To fully evaporate 1 kilogram of water at 100 degrees Celcius to 1 kilogram of steam, you need 2256 kilojoules.
Water cannot exist at 101 degrees Celcius at ambient pressures, so before the “mixture” can reach 101 degrees Celcius, it would all have to have evaporated.
The speed of evaporation is purely dependent on the rate at which heat is added. A 2kW element would take twice as long to boil the water than a 4kW element.
The only place where the thermostat becomes relevant is if the cup you’re boiling the water in is an insulator and heat cannot get into the cup fast enough – so the environment temperature causes the thermostat to swirch off until the environment cools down.
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