Chemical Thermodynamics Question 242

Question: $ 2.2016,gm $ of acetaldehyde produced $ 13.95,kcal $ of heat on combustion in $ O_2 $ . Calculate the heat of combustion of $ CH_3CHO $ [Bihar CEE 1995]

Options:

A) 279 kcal

B) 972 kcal

C) 27.9 kcal

D) 2.79 kcal

Show Answer

Answer:

Correct Answer: A

Solution:

$ \Delta H=\frac{13.95\times 44}{2.2016}=278.7kcal $ .



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