Exam4-Review questions - Chem XXI Exam 4 Review Questions-...

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Chem XXI Exam 4 Review Questions- Fall 2008 Here as some additional problem that you can use to test your chemical thinking. These problems will the be focus of the preceptor review session Sunday. 1) Small, equal-sized drops of oil, water and mercury lie on a waxed floor. How does each liquid behave? 2) Warm-blooded animals have a narrow range of body temperature because their bodies have a high water content Explain. 3) Would you predict an aqueous solution of ethanol (CH 3 CH 2 OH) to have a higher or lower surface tension than pure water? Why? 4) Viscosity-enhancing additives increase the viscosity of a motor oil as the temperature increases. Provide an explanation for how they work? 5) Pentanol (C 5 H 11 OH) has about the same molar mass as hexane (C 6 H 14 ) but is more than 12 times as viscous at room temperature. Explain. 6) When tin is added to copper, the resulting alloy (bronze) is much harder than copper. Explain.
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Exam4-Review questions - Chem XXI Exam 4 Review Questions-...

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