Based on the thermodynamic properties provided from the following list for methanol, determine the equation(s) necessary to calculate the amount of energy needed for 5.0 kg of methanol to go from –15°C to 31°C.

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.