How Much Heat is Released When Water Cools?

[noorjabaieh]

Need help on energy equations please!

Homework Statement

I need help on this homework question please i don't know how to solve it

Homework Equations

how many calories of heat are released by 25 g of water as it drops in temperature from 77 degrees c to 50 degrees c ( 1 cal= 4.18)

The Attempt at a Solution

I don't know which equation i should use
Q= cmDeltaT ?

 

[Chi Meson]

try it.