Chemical Thermodynamics Question 285

Question: If $ C+O_2\to CO_2+94.2,kcal $

$ H_2+\frac{1}{2}O_2\to ,H_2O+68.3,kcal $

$ CH_4+2O_2,\to ,CO_2+2H_2O+210.8,kcal $ Then the possible heat of methane will be [UPSEAT 2001]

Options:

A) 47.3 kcal

B) 20.0 kcal

C) 45.9 kcal

D) - 47.3 kcal

Show Answer

Answer:

Correct Answer: B

Solution:

By 2 × (i) + (ii) - (iii) $ \Delta H $ of methane $ =20.0,kcal $ .



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