Use a graduated cylinder to add
approximately 40 mL of water to the
calorimeter. Measure the mass of the
calorimeter (no lid) and water to the
nearest 0.01 g.

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.