[Ilikebugs]

Which of the following equations is not correct?
A| H2 (g) -> 2H (g) + energy
B| Na(g) + e - -> Na-(g) + energy
C| Mg(g) + energy -> Mg 2+ (g) + 2e -
D| Cu(s) + energy -> Cu(l)
E| Na + (g) + Cl - (g) -> NaCl(s) + energy

I don't see any problem with them where energy is on the left for decomposition and on the right for synthesis, is there no energy needed to change the state of copper perhaps?

[Mitch]

Does A look right to you?

[Ilikebugs]

Oh, is A wrong because it decomposes but it outputs energy?

[Enthalpy]

The atomization of H₂ absorbs energy.

I've seen "decomposition" said from other reactions, like acetylene producing soot and gases, which does release energy, boom.