What is the stability order of the compounds (with reason)- benzene,naphthalene and phenanthrene.

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Solution

more benzene ring more conjugation of pi electrons more stability so phenathrene > napthlene > benzene

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QUESTION 2.38

Benzene and naphthalene form ideal solution over the entire range of composition. The vapour pressure of pure benzene and naphthalene at 300 K are 50.71 mm Hg and 32.06 mm Hg respectively. Calculate the mole fraction of benzene in vapour phase if 80 g of benzene is mixed with 100 g of naphthalene.

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