From the following data, (i) H2(g) + CO2(g) $\rightleftharpoons$ H2O(g) + CO(g); K2000 K = 4.4(ii) 2

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From the following data, (i) H2(g) + CO2(g) $\rightleftharpoons$ H2O(g) + CO(g); K2000 K = 4.4(ii) 2H2O(g) $\rightleftharpoons$ 2H2(g) + O2(g); K2000 K = 5.31 × 10−10(iii) 2CO(g) + O2(g) $\rightleftharpoons$2CO2(g); K1000 K = 2.24 × 1022 show whether reaction(iii) is exothermic or endothermic or thermal.

Accepted Answer

From (i) and (ii), 2CO(g) + O2(g) $ightleftharpoons$2CO2(g)$K_{2000} = \frac{1}{(4.4)^{2} 	imes 5.31 	imes 10^{- 10}} = 9.73 	imes 10^{7}$K1000 = 2.24 × 1022On increasing temperature, Keq is decreased and hence, ΔH° = –ve.

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