How much heat is required, in joules, to raise the temperature of 15.0 g of water from 50 °C to 100 °C?

Answer 1

You'll need the specific heat of water to answer this question. The value is 4.184 J/g/deg

The equation that you'll want to use is q = mC∆T where

q = heat = ?

m = mass = 15.0 g

C = specific heat = 4.184 J/g/deg

∆T = change in temperature = 100º - 50º = 50º

q = (15.0 g)(4.184 J/g/deg)(50 deg)

q = 3138 joules = 3140 joules (to 3 significant figures)