1At standard pressure, hydrogen peroxide, H2O2, melts at –0.4°C, boils at 151°C, and is very soluble in water. A bottle of aqueous hydrogen peroxide, H2O2(aq), purchased from a pharmacy has a pressure-releasing cap. Aqueous hydrogen peroxide decomposes at room temperature, as represented by the balanced equation below. 2H2O2(aq) --> 2H2O(l ) + O2(g) + 196.0 kJState, in terms of both melting point and boiling point, why H2O2 is a liquid at room temperature.