Three thermochemical equations are given below:
(i) C(graphite) + O2(g) \(\rightarrow\) CO2(g); \(\Delta_{r}\)H° = x kJ mol–1
(ii) Cgraphite + 1/2 O2(g) \(\rightarrow\) CO(g); \(\Delta_{r}\)H° = y kJ mol–1
(iii) CO(g) + 1/2 O2(g) \(\rightarrow\) CO2(g); \(\Delta_{r}\)H° = z kJ mol–1
 
Based on the above equations, find out which one of the relationships given below is correct :
1. z = x + y 2. x = y + z
3. y = 2z – x 4. x = y – z
Subtopic:  Hess's Law |
 79%
From NCERT
NEET - 2013
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