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Q.

If the enthalpy of combustion of benzene(l) carbon(s) and hydrogen (g) are Q1 , Q2 and Q3 respectively, what will be enthalpy of formation of Benzene?

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a

Q1+6Q2+Q3

b

6Q2+Q1+3Q3

c

6Q2−3Q3−Q1

d

6Q2+3Q3−Q1

answer is D.

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Detailed Solution

C6H6(l)+152O2(g)⟶6CO2(g)+3H2O(l)

6×Q2+3×Q3−x=Q1

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