Chemical Thermodynamics Question 190

Question: The standard molar heat of formation of ethane, $ CO_2 $ and water (l) are respectively - 21.1, - 94.1 and - 68.3 kcal. The standard molar heat of combustion of ethane will be [IIT JEE 1986; DPMT 2005]

Options:

A) - 372 kcal

B) 162 kcal

C) -240 kcal

D) 183.5 kcal

Show Answer

Answer:

Correct Answer: A

Solution:

$ C_2H_6+,\frac{7}{2}O_2\to 2CO_2+3H_2O $ substitute the values.



NCERT Chapter Video Solution

Dual Pane