$ SO_2+\frac{1}{2}O_2\to SO_3+y,kcal $ Find out the heat of formation of $ SO_2 $ [AIIMS 1997; CBSE PMT 1999; KCET 1999]
A) $ 2x-y $
B) $ 2x+y $
C) $ x+y $
D) $ 2x/y $
Correct Answer: A
Subtract equation (ii) from (i).
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