Based on the enthalpy changes given for the reactions, which reactions are endothermic?
2h2o → 2h2 + o2, δh = 484 kj
c + o2 → co2, δh = -394 kj
h2 + br2 → 2hbr, δh = -73 kj
2nh3 → n2 + 3h2, δh = 92 kj

i believe the answer is three water molecules

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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answerambulatory;