For the reactions: C+O_2 CO_2; H=-393 kJ 2Zn+O_2 2ZnO; H=-412 kJ which one is correct?

JEE Main Chemistry question

For the reactions: ; ; which one is correct?

(A)Carbon can reduce ZnO to ZnCorrect
(B)Oxidation of carbon is not feasible
(C)Oxidation of Zn is not feasible
(D)Zn liberates more heat than carbon during oxidation

Answer: (A)

Solution

Combining () with () gives with a very small net (); at the high temperatures used industrially, the large increase in gaseous moles/entropy makes this carbothermic

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Question ID VK-135257