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2. Portable lanterns and stoves used for camping and backpacking often use a mixture of Cs and Co hydrocarbons known as "white gas". The normal boiling point of pentane, CsH12, is 36.0C, and the enthalpy of vaporization is 27.6 kJ/mol. Determine the vapor pressure of pentane on a morning when the temperature is 5.0C. [4 points)