In a different experiment, the pressure and temperature inside a container holding a different alcohol were monitored each minute. The container volume and the
amount of gas did not change during cooling. The temperature and pressure data
appear in the table below.

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.