If a calorimeter's AH is +2001 Joules, how much beat did the substance inside the cup lose? b) Calculate AH if a piece of aluminum with a specific heat of 0.9 kJ o kg ? K and a mass of 1600g is heated from 286k to 299K c) If the calculated value of AH is positive, does that correspond to an endothermic reaction or on exothermic reactions