1. The problem statement, all variables and given/known data Find the minimum amount of work required to extract 4000 J of heat from a body at 0 deg F, when the temprature of the enviroment is 100 deg F. 2. Relevant equations W = (1 - t2/t1) * Q1 3. The attempt at a solution My answer is 1072 J instructor says 870.19, how??