નીચેના ઉષ્મારાસાયણિક સમીકરણોના આધારે

${H_2}O(g) + C(s) \to CO(g) + {H_2}(g);\,\Delta H = 131\,kJ$$CO(g) + \frac{1}{2}{O_2}(g) \to C{O_2}(g);\Delta H = - 282\,kJ$

${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g);\,\Delta H = - 242\,kJ$

$C(s) + {O_2}(g) \to C{O_2}(g);\,\Delta H = X\,kJ$

$X$ નું મૂલ્ય ......$kJ$

Question

નીચેના ઉષ્મારાસાયણિક સમીકરણોના આધારે

${H_2}O(g) + C(s) \to CO(g) + {H_2}(g);\,\Delta H = 131\,kJ$$CO(g) + \frac{1}{2}{O_2}(g) \to C{O_2}(g);\Delta H = - 282\,kJ$

${H_2}(g) + \frac{1}{2}{O_2}(g) \to {H_2}O(g);\,\Delta H = - 242\,kJ$

$C(s) + {O_2}(g) \to C{O_2}(g);\,\Delta H = X\,kJ$

$X$ નું મૂલ્ય ......$kJ$

AIPMT 1992, Medium

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Solution

a
(a) eq. $(i) +$ eq. $(ii) +$ eq. $(iii)$ gives
$X = 131 - 282 - 242 = - \,393\,kJ$.

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