Question

What amount of heat is required to raise the temperature of 20 grams of water from 10°C to 30°C? The specific heat of water is 4.18 J/g°C.

Answer 1

q = mC(Tf-Ti)
where q is the amount of heat needed, C is the specific heat, Tf is the final temperature, Ti is the initial temperature. Substitute the appropriate quantities into the problem and evaluate q.