If you added 15,000 calories to 2.0 l of water that was at 25.0 degrees c, what temperature would it be at when you finished?

When we finish, the temperature would be 32.5℃

Explanation:

Density of water = mass/volume

So,

Mass of water = Density × Volume

where

= Final T - Initial T

Q is the heat energy in calories

c is the specific heat capacity (for water 1.0  cal/(g℃))  

m is the mass of water

plugging in the values  

Final T = ∆T + Initial T

= 7.5℃ + 25℃ = 32.5℃ (Answer).

if you're asking what comes out, it's steam.