Naphthalene,a Substance Present in Some Mothballs,has a Molar Heat of Vaporization

question 14

Multiple Choice

Naphthalene,a substance present in some mothballs,has a molar heat of vaporization of 49.4 kJ/mol.If the vapor pressure of naphthalene is 0.300 mm Hg at 298 K,what is the temperature at which the vapor pressure is 7.60 × 10² mm Hg? (R = 8.31 J/K.mol)

• A) 424 K
• B) 491 K
• C) 501 K
• D) 521 K
• E) 611 K

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