JEE Main 2019 Chemistry question
Given: (i) C(graphite) + O(g) → CO(g); = x kJ mol; (ii) C(graphite) + ½O(g) → CO(g); = y kJ mol; (iii) CO(g) + ½O(g) → CO(g); = z kJ mol. Based on the above thermochemical equations, find out which one of the following algebraic relationships is correct?
Answer: (B)
Solution
(i) = (ii) + (iii). (The product of (ii) is misprinted as CO in the source.)