How many Joules of heat are needed to raise the temperature of 250. g of water from 20.5oC to 100.0oC if it takes 4.184J to raise the temperature of exactly 1 gram of water exactly 1 Celsius degree (4.184 J/(goC) is water's specific heat). (HINT: Begin with the quantity that has the unit you want and use to other quantities to cancel out unwanted units.)