LARCchem1bwk5 - B. Which substance boils at the highest...

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Cindy Nguyen LARC Chem 1B: Week 5 W’08 Professor King Ch. 11 – Vapor Pressure Unit Cell Problem An element crystallizes in a face-centered cubic lattice and has a density of 1.45 g/cm 3 . The edge of its unit cell is 4.53x10 -8 cm. A. How many atoms are in each unit cell? B. What is the volume of a unit cell? C. What is the mass of a unit cell? D. Calculate the approximate mass for the element. Vapor Pressure The vapor pressure vs. temperature plot for three substances (A, B, and C) is shown. A. Which substance has more molecules in the gas phase at 40°C?
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Unformatted text preview: B. Which substance boils at the highest temperature? C. What is the normal boiling point of substance A? D. What is the boiling point of substance B in Breckenridge Colorado (atmospheric pressure: 520 torr)? E. Which substance has the greatest heat of vaporization? F. Match substance A, B, and C to each of the following. HOCH 2 CH 2 OH H 2 O CH 3 OH Vapor Pressure Calculation At 20°C, mercury has a vapor pressure of 1.2x10-3 torr. At what temperature would the vapor pressure of mercury be at 5.0x10-5 torr (ΔH vap = 59.1 kJ)?...
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This note was uploaded on 04/10/2008 for the course CHEM 1B taught by Professor King during the Winter '08 term at UC Irvine.

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