Calculate the energy needed to heat 4 kg of water from 25C to 45C:

(1 cal/ g C)x(4000 g)x(45-25)C =

I know how to get the first part which is 80000 by 4000x20 but the answer is 80 and that's where I've become stumped figuring I'm going to divide it, I just don't know by what or how to get the number to do it. Except $$1000\div80000=80$$ just have no clue where I'm getting the 1000 not sure if I'm even dividing it..

Question

Calculate the energy needed to heat 4 kg of water from 25C to 45C:

(1 cal/ g C)x(4000 g)x(45-25)C =

I know how to get the first part which is 80000 by 4000x20 but the answer is 80 and that's where I've become stumped figuring I'm going to divide it, I just don't know by what or how to get the number to do it. Except $$1000\div80000=80$$ just have no clue where I'm getting the 1000 not sure if I'm even dividing it..

turingtest · Answer

is the answer in KiloCalories (KC or sometimes just C) perhaps?

michele_laino · Answer

since: 1Kcal=1,000 cal, so, please, you have to divide by 1000 your final result