Chemical Thermodynamics Question 277

Question: $ C(s)+O_2(g),\to ,CO_2;\Delta H=-94,kcal $

$ CO(g)+\frac{1}{2}O_2(g),\to ,CO_2;,\Delta H=135.2,kcal $ Then heat of formation of $ CO(g) $ is [DCE 2001]

Options:

A) - 26.4 kcal

B) 41.2 kcal

C) 26.4 kcal

D) - 229.2 kcal

Show Answer

Answer:

Correct Answer: D

Solution:

By (i) - (ii) : $ C+\frac{1}{2}O_2\to CO;,\Delta H=-229.2. $



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