Calculate the enthalpy of formation of carbon monoxide (CO) from the following data:
(i) C(s) + O₂(g) → CO₂(g); Δ_rH° = −393.5 kJ mol⁻¹
(ii) CO(g) + 1/2O₂(g) → CO₂(g); Δ_rH° = −283.0 kJ mol⁻¹

Question

Calculate the enthalpy of formation of carbon monoxide (CO) from the following data:
(i) C(s) + O₂(g) → CO₂(g); Δ_rH° = −393.5 kJ mol⁻¹
(ii) CO(g) + 1/2O₂(g) → CO₂(g); Δ_rH° = −283.0 kJ mol⁻¹

Shiksha Nation · Accepted Answer

We aim at : C(s) +1/2O2(g) → CO(g); ΔfH° = ?Subtracting equation (ii) from equation (i), we getC(s) + 1/2 O2(g) − CO(g) → 0; ΔrH° = −393.5 − (−283.0) = −110.5 kJ mol−1C(s) +1/2O2(g) → CO(g); ΔrH° = −110.5 kJ

Calculate the enthalpy of formation of carbon monoxide (CO) from the following data:(i) C(s) + O2(g) → CO2(g); ΔrH° = −393.5 kJ mol−1(ii) CO(g) + 1/2O2(g) → CO2(g); ΔrH° = −283.0 kJ mol−1

Verified Answer

Calculate the enthalpy of formation of carbon monoxide (CO) from the following data:
(i) C(s) + O₂(g) → CO₂(g); Δ_rH° = −393.5 kJ mol⁻¹
(ii) CO(g) + 1/2O₂(g) → CO₂(g); Δ_rH° = −283.0 kJ mol⁻¹