Chemical Thermodynamics Question 282
Question: The values of $ \Delta H $ for the combustion of ethene and ethyne are - 341.1 and - 310.0kcal respectively. Which of the following is a better fuel [BHU 2001]
Options:
A) $ C_2H_2 $
B) $ C_2H_4 $
C) Both of these
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ \Delta H $ for $ C_2H_6=-341.1,K,cal $ its calorific value $ =\frac{-341.1}{30}=-11.37,kcal/g $ .
$ \Delta H $ for $ C_2H_2=-310.0,kcal $ its Calorific value $ =\frac{-310.0,}{26}=-11.92, $
hence $ C_2H_2 $ is a better fuel.
