Enthalpy of Reaction

Question

Please do include a solution. Thank you!

1. 3𝐻2(𝑔) + 𝑂3(𝑔) → 3𝐻2𝑂(𝑙)

2. 𝑁2𝑂(𝑔) + 𝑁𝑂2(𝑔) → 3N𝑂(𝑔)

3. 𝐶𝑎𝐶2(𝑠) + 2𝐻2𝑂(𝑙) → 𝐶𝑎(𝑂𝐻)2(𝑠) + 𝐶2𝐻2(𝑔)

Answer 1

I think we need a little more information in order to answer this question. Are you given ∆Hformations, or any other thermodynamic data? Bond energies? Can't answer without more data.