The pressure of 500 mL of neon changes from 760 mm Hg to 1520 mm Hg which changes the volume to 1.5 L. If the initial temperature -73°C what is the new temperature?

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.