🤓 Based on our data, we think this question is relevant for Professor Broome's class at University of Southern Mississippi.
We’re being asked to determine the enthalpy change (ΔHrxn) for the chemical reaction:
X (s) + 1/2 O2 (g) + CO2 (g) → XCO3(s)
We can use Hess’s Law to determine the enthalpy change of the overall reaction from the given reactions:
1. X (s) + 1/2 O2(g) → XO (s) ΔH1 = -639.7
2. XCO3 (s) → XO (s)+CO2 (g) ΔH2 = 349.7
Step 1. We now need to find a combination of reactions that when added up, gives us the overall reaction.
Given these reactions:
X(s) +1/2 O2(g) → XO(s)
XCO3(s) → XO(s)+CO2(g)
What is H(rxn) for this reaction?
X(s)+1/2 O2(g)+CO2(g) --> XCO3(s)