Given the thermochemical expression BaO (s) + CO2 (g) =
BaCO3(s)
AH° = -662.8 kJ
Write the thermochemical expression for the production of 4 mol CO2 by decomposition of solid
barium carbonate.

Explanation:

Hello,

In this case, in order to answer to the requirement, we first should invert the given reaction since it is the formation of barium carbonate and we need its decomposition:

Thereby, the enthalpy of reaction is inverted, to positive since it is the contrary reaction:

Nevertheless, we need to specify it for the formation of 4 moles of carbon dioxide it means:

Which finally results in the following thermochemical expression:

Regards.