HW 1 - Wright Jacqueline Homework 1 Due 11:00 am Inst James...

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Wright, Jacqueline – Homework 1 – Due: Sep 11 2007, 11:00 am – Inst: James Holcombe 1 This print-out should have 31 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. The due time is Central time. 001 (part 1 oF 1) 10 points The vapor pressure oF CH 3 COCH 3 (propa- none or acetone), is 67 Torr at 0 C and 222 Torr at 25 C. What is the normal boil- ing point oF propanone? The universal gas constant is 8 . 314 J K · mol . Answer in units oF C. 002 (part 1 oF 1) 10 points Arsine (AsH 3 ) is a highly toxic compound used in the electronic industry For the pro- duction oF semiconductor. Its vapor pressure is 35 Torr at - 111 . 95 C and 253 Torr at - 83 . 6 C. What is the standard enthalpy oF vaporization oF arsine? Answer in units oF kJ / mol. 003 (part 1 oF 1) 10 points The vapor pressure oF CH 3 COCH 3 (propa- none or acetone), is 67 Torr at 0 C and 222 Torr at 25 C. What is the standard en- tropy oF vaporization oF propanone? Answer in units oF J K · mol . 004 (part 1 oF 1) 10 points The vapor pressure oF hydrogen azide (HN 3 ) is 58 Torr at - 22 . 75 C and 512 Torr at 25 C. What is the standard Free energy oF vaporiza- tion oF hydrogen azide? Answer in units oF C. 005 (part 1 oF 1) 10 points Methane (CH 4 ) Forms a molecular solid. What type oF Forces hold it in a solid con- fguration? I) London Forces II) dipole-dipole Forces III) hydrogen bonding 1. II and III only 2. I and II only 3. I, II, and III 4. III only 5. I only 6. II only 006 (part 1 oF 1) 10 points Which one oF the Following statements is NOT applicable to molecular solids? 1. Molecular solids have relatively low melt- ing points. 2. Molecular solids are soFt compared to covalent solids. 3. Molecular solids are usually excellent con- ductors oF electric current. 007 (part 1 oF 1) 10 points When a gas expands into a vacuum, w = 0. 1. True 2. ±alse 008 (part 1 oF 1) 10 points Consider the Following classic: Humpty Dumpty sat on a wall. .. Humpty Dumpty had a great Fall. .. All the king’s horses and all the king’s men Couldn’t put Humpty back together again. Poor Humpty Dumpty has Fallen prey to a particular law oF nature know as 1. the 1st Law oF Thermodynamics.
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This note was uploaded on 12/08/2008 for the course CH 302 taught by Professor Holcombe during the Spring '07 term at University of Texas.

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HW 1 - Wright Jacqueline Homework 1 Due 11:00 am Inst James...

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