Chemical EquilibriumMedium
Question
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.
Options
A.Exothermic
B.Endothermic
C.Thermal
D.Cannot say
Solution
From (i) and (ii), 2CO(g) + O2(g) $\rightleftharpoons$2CO2(g)
$K_{2000} = \frac{1}{(4.4)^{2} \times 5.31 \times 10^{- 10}} = 9.73 \times 10^{7}$
K1000 = 2.24 × 1022
On increasing temperature, Keq is decreased and hence, ΔH° = –ve.
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