chm 2046 quiz 1 - How much energy is required to vaporize...

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How much energy is required to vaporize 158 g of butane (C4H10) at its boiling point, if its Hvap is 24.3 kJ/mol? a. 15.1 kJ b. 66.1 kJ (this one) c. 89.4 kJ d. 11.2 kJ e. 38.4 kJ 2. (Points: 1.2) The magnitude of the heats of vaporization, fusion and sublimation of a substance reflect the a. density of the substance. b. magnitudes of the boiling and melting points of the substance. c. strength of the covalent bonds between atoms in each molecule of the substance. d. strength of the intermolecular forces of the substance. Larose 1
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Determine the vapor pressure (in torr) of a substance at 36°C, whose normal boiling point is 84°C and has a Hvap of 22.1 kJ/mol. MISS a. 239 torr -------------- b. 31.8 torr c. 41.8 torr d. 147 torr e. 98 torr Which is expected to have the largest dispersion forces? a. C2H6 b. C8H18 c. N2 d. CO2 Which of the following compounds has the highest boiling point? MISS a. H2O b. HCl c. H2S d. NH3 2
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. (Points: 1.2) Which of the following statements is TRUE? a. Vapor pressure increases with temperature. b. Hydrogen bonds are chemical bonds.
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This note was uploaded on 04/15/2010 for the course CHM 2046 taught by Professor Dixon during the Spring '08 term at University of Central Florida.

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chm 2046 quiz 1 - How much energy is required to vaporize...

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