[sandi]

determine mass of coal (carbon) that must be burned and compare that to the mass of uranium that would be required to convert 2500 m ^3 of water at 20*C to steam at 100*C.

given:
C(H2O)= 4.18 j/g*C
Lv(H2O)= 2.27x10^3 J/g
Mm U-235= 235.04 g/mol
(1m*3= 1000L=1000 Kg H2O)

i dont need the full answer if you do not have time! i am just lost and dont know where to begin! thank you!

[Corribus]

The first thing you need to do is determine how much energy it takes to do the water temperature conversion. The second thing is to write balanced equations for burning of coal and usage of uranium, and associated energy output.