1AWS11 - mol. The ∆ H fus for mercury is 2.33 kJ/mol. How...

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Chem. 1A Chapter 11 Worksheet 1. Identify the most important types of interparticle forces present in the solids of each of the following substances. a. Ar b. HCl c. HF d. CaCl 2 e. CH 4 f. CO g. NaNO 3 2. Identify the intermolecular forces for the following and rank in order from the expected weakest (1) to strongest (5). CH 4 C 2 H 5 OH CH 3 SH H 2 O C 4 H 10 3. In each of the following groups of substances, pick the one that has the given property. Justify your answer. a. highest boiling point: HCl, Ar, or F 2 b. highest freezing point: H 2 O, NaCl, or HF c. lowest vapor pressure: 25 ° C:Cl 2 , Br 2 , or I 2 d. lowest freezing point: N 2 , CO, or CO 2 e. lowest boiling point: CH 4 , CH 3 CH 3 , or CH 3 CH 2 CH 3 f. highest boiling point: HF, HCl, or HBr g. lowest vapor pressure @ 25 ° C: propane, acetone, propanol 4. Define with a brief description and give an example for: Viscosity. 5. Mercury has a normal melting point of -38.9 ˚C. The molar heat capacity of liquid mercury is 27.9 J/K mol and the molar heat capacity of solid mercury is 28.2 J/K
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Unformatted text preview: mol. The ∆ H fus for mercury is 2.33 kJ/mol. How much heat is needed to heat 10.5 g of Hg from -50.0 ˚C to +50.0 ˚C? 6. The vapor pressure of 10 mL of water at 25 ° C is (Greater than//equal to// less than) 20 mL of water at 25 ° C. 7. The boiling point of water in Denver (the mile-high city) is (Greater than//equal to// less than) the boiling point of water in Los Angeles. 8. The phase diagram for benzene (C 6 H 6 ) is shown below: a) Label the solid, liquid, gas, and supercritical fluid regions. b) What physical state exists at T = 150 o C, P = 6 atm? c) Indicate on the graph where the triple point and critical point would be found. d) Describe the change in physical state in going from points A to B to C to D. e) Will solid benzene melt when pressure is applied? Why or why not? Support your answer with evidence from the phase diagram. olid L iquid as Super critical fluid Tr iple Pt Critical Pt...
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This note was uploaded on 04/17/2008 for the course CHEM 1 taught by Professor Evans during the Fall '06 term at UC Irvine.

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1AWS11 - mol. The ∆ H fus for mercury is 2.33 kJ/mol. How...

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