Problem: Calculate ΔHrxn for the reaction CaO(s) + CO2(g) → CaCO3(s) given these reactions and their ΔH values: Express the enthalpy in kilojoules to one decimal place.Ca(s) + CO2(g) + 1/2O2 → CaCO3 (s)   ΔH = −814.1 kJ2Ca(s) + O2(g) → 2CaO(s)                    ΔH = −1269.8 kJ

FREE Expert Solution
92% (329 ratings)
FREE Expert Solution

To find the ΔHrxn, we need to use the Hess's Law where we have to rearrange the given equations to get the desired reaction.

92% (329 ratings)
Problem Details

Calculate ΔHrxn for the reaction CaO(s) + CO2(g) → CaCO3(s) given these reactions and their ΔH values: 

Express the enthalpy in kilojoules to one decimal place.

Ca(s) + CO2(g) + 1/2O2 → CaCO(s)   ΔH = −814.1 kJ

2Ca(s) + O2(g) → 2CaO(s)                    ΔH = −1269.8 kJ


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