Three thermochemical equations are given below (i) C(graphite) + O2(g) $ \to $ CO2(g); $\Delta $rHo = x kJ mol$-$1 (ii) C(graphite) + ${1 \over 2}$O2(g) $ \to $ CO(g); $\Delta $rHo = y kJ mol$-$1 (iii) CO(g) + ${1 \over 2}$O2(g) $ \to $ CO2(g); $\Delta $rHo = z kJ mol$-$1 Based on the above equations, find out which of the relationship given below is correct.

Question

Three thermochemical equations are given below
(i)  C_(graphite) + O_2(g) $ \to $ CO_2(g); $\Delta $_rH^o = x kJ mol^$-$1
(ii)  C_(graphite) + ${1 \over 2}$O_2(g) $ \to $ CO_(g); $\Delta $_rH^o = y kJ mol^$-$1
(iii)  CO_(g) + ${1 \over 2}$O_2(g) $ \to $ CO_2(g); $\Delta $_rH^o = z kJ mol^$-$1
Based on the above equations, find out which of the relationship given below is correct.

z = x + y

x = y + z

y = 2z $-$ x

x = y $-$ z

Solution

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