Chemistry

Chemistry

Problem

Use the following thermochemical equations to determine ΔH\Delta H for the reaction CO(g)+12 O2(g)+H2O(l)→H2CO3(aq)\mathrm{CO}(g)+\tfrac12\,\mathrm{O_2}(g)+\mathrm{H_2O}(l)\rightarrow\mathrm{H_2CO_3}(aq). 1) C(s)+12 O2(g)→CO(g)ΔH1=−110.5 kJ\mathrm{C}(s)+\tfrac12\,\mathrm{O_2}(g)\rightarrow\mathrm{CO}(g)\qquad \Delta H_1=-110.5\ \text{kJ} 2) C(s)+O2(g)→CO2(g)ΔH2=−393.5 kJ\mathrm{C}(s)+\mathrm{O_2}(g)\rightarrow\mathrm{CO_2}(g)\qquad \Delta H_2=-393.5\ \text{kJ} 3) CO2(g)+H2O(l)→H2CO3(aq)ΔH3=−45.5 kJ\mathrm{CO_2}(g)+\mathrm{H_2O}(l)\rightarrow\mathrm{H_2CO_3}(aq)\qquad \Delta H_3=-45.5\ \text{kJ} a) −239 kJ-239\ \text{kJ} b) −156 kJ-156\ \text{kJ} c) −328.5 kJ-328.5\ \text{kJ} d) +328.5 kJ+328.5\ \text{kJ}

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