Ethanol, CH3 — CH2 — OH, is obtained from renewable crops such as corn, which use the Sun...

Ethanol, CH3 — CH2 — OH, is obtained from renewable crops such as corn, which use the Sun as their source of energy. In the United States, automobiles can now use a fuel known as E 85 that contains 85.0% ethanol and 15.0% gasoline by volume. Ethanol has a melting point of −115 °C, a boiling point of 78 °C, a heat of fusion of 98.7 J/g, and a heat of vaporization of 841 J/g. Liquid ethanol has a density of 0.796 g/mL and a specific heat of 2.46 J/g °C.

a. Draw a heating curve for ethanol from −150 °C to 100 °C

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b. When 20.0 g of ethanol at −62 °C is heated and completely vaporized at 78 °C, how much energy (kJ) is required?

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c. If a 15.0-gallon gas tank is filled with E 85, how many liters of ethanol are in the gas tank?

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d. Write the balanced chemical equation for the complete combustion of ethanol.

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e. How many kilograms of CO2 are produced by the complete combustion of the ethanol in a full 15.0-gal gas tank?

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f. What is the strongest attractive force between liquid ethanol molecules?