posted by Timofey .
When sodium burns in air it produces a bright white light and heat energy
2Na + O2 2Na2O ?H = -414kJ/mol
What would you expect to be the heat energy associated with the reverse process
2Na2O 2Na + O2
Can you please show the entire calculation with units please?
This is what I have but it is wrong:
2 moles Na2O x +414 kJ/mol /2moles Na2O = +828 kJ
See your post above.