If Maria lifts a mass of 10 kg onto a table 1.25 m high. How much G. P.E. has the mass gained?

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.

D. h2o + h2o > h3o + oh- confirmed.