Question
Given
(i) C (graphite) + O2(g) $ \to $ CO2(g); $\Delta $rH$^\Theta $ = x kJ mol$-$1
(ii) C(graphite) + ${1 \over 2}$O2(g) $ \to $ CO(g); $\Delta $rH$^\Theta $ = y kJ mol$-$1
(iii) CO(g) + ${1 \over 2}$ O2(g) $ \to $ CO2(g); $\Delta $rH$^\Theta $ = z kJ mol$-$1
Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?
(i) C (graphite) + O2(g) $ \to $ CO2(g); $\Delta $rH$^\Theta $ = x kJ mol$-$1
(ii) C(graphite) + ${1 \over 2}$O2(g) $ \to $ CO(g); $\Delta $rH$^\Theta $ = y kJ mol$-$1
(iii) CO(g) + ${1 \over 2}$ O2(g) $ \to $ CO2(g); $\Delta $rH$^\Theta $ = z kJ mol$-$1
Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?