Chemical Thermodynamics Question 195
Question: The heats of combustion of rhombic and monoclinic sulphur are respectively 70960 and 71030 calories. What will be the heat of conversion of rhombic sulphur to monoclinic [MP PMT/PET 1988]
Options:
A) 70960 calories
B) 71030 calories
C) - 70 calories
D) + 70 calories
Show Answer
Answer:
Correct Answer: C
Solution:
S (rhombic) $ +,O_2\to SO_2 $ , $ \Delta H=70960,cal. $ -(i) S (monoclinic) $ +,O_2\to SO_2 $
$ \Delta H=71030,cal $ -(ii) Aim: S (rhombic) $ \to $ S (monoclinic) eq. (i) - eq. (ii) gives the required result.
