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QNEET-2013-Ch-1534: NEET 2013 Chemistry - Class 11 NEET-2013-Ch-1534 Solution: Three thermochemical equations are given below (i) \(C(…

Three thermochemical equations are given below (i)

C(\text{graphite}) + O_2(g) \rightarrow CO_2(g); \Delta_r H^\circ = x\ \text{kJ mol}^{-1}

(ii)

C(\text{graphite}) + \frac{1}{2}O_2(g) \rightarrow CO(g); \Delta_r H^\circ = y\ \text{kJ mol}^{-1}

(iii)

CO(g) + \frac{1}{2}O_2(g) \rightarrow CO_2(g); \Delta_r H^\circ = z\ \text{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

Step-by-Step Verified Solution

According to Hess's law, equation (i) is equal to equations (ii) + (iii)