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ChapterTweleveReview - 12review Student 1 Pentane C5H12...

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12review Student: ___________________________________________________________________________ 1. Pentane, C 5 H 12 , boils at 35°C. Which of the following is true about kinetic energy, E k , and potential energy, E p , when liquid pentane at 35°C is compared with pentane vapor at 35°C? A. E k ( g ) < E k ( l ); E p ( g ) E p ( l ) B. E k ( g ) > E k ( l ); E p ( g ) E p ( l ) C. E p ( g ) < E p ( l ); E k ( g ) E k ( l ) D. E p ( g ) > E p ( l ); E k ( g ) E k ( l ) E. E p ( g ) E p ( l ); E k ( g ) E k ( l ) 2. A sample of octane in equilibrium with its vapor in a closed 1.0-L container has a vapor pressure of 50.0 torr at 45°C. The container's volume is increased to 2.0 L at constant temperature and the liquid/vapor equilibrium is reestablished. What is the vapor pressure? 3. The phase diagram for xenon has a solid-liquid curve with a positive slope. Which of the following is true? 1
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