Chemical Thermodynamics Question 247
Question: The values of heat of formation of $ SO_2 $ and $ SO_3 $ are $ -298.2,kJ $ and $ -98.2,kJ $ . The heat of reaction of the following reaction will be $ SO_2+\frac{1}{2}O_2\to SO_3 $ [BHU 1997; CBSE PMT 2000]
Options:
A) $ -200,kJ $
B) $ -356.2,kJ $
C) $ +200,kJ $
D) $ -396.2,kJ $
Show Answer
Answer:
Correct Answer: C
Solution:
$ S+O_2\to SO_2,\Delta H=-298.2kJ $ -.(i) $ SO_2+\frac{1}{2}O_2\to SO_3,\Delta H=-98.2kJ $ -.(ii) eq. (i) - (ii) and find the required result.
