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Homework 02

# Homework 02 - Gadhia Tejas Homework 2 Due 11:00 am Inst...

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Gadhia, Tejas – Homework 2 – Due: Sep 18 2007, 11:00 am – Inst: James Holcombe 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points The temperature at which water boils can be increased by adding some solute, like ethylene glycol. This is known as a colligative property. 1. True 2. False 002 (part 1 of 1) 10 points The colligative effects of 1 molal sugar solu- tion would be ? 1 molal sodium chloride solution. 1. the same as 2. less than 3. greater than 003 (part 1 of 1) 10 points The vapor pressure of a volatile component in a solution decreases as its mole fraction decreases. This is known as 1. Henry’s Law. 2. LeChatelier’s Principle. 3. Raoult’s Law. 4. Bragg’s Law. 004 (part 1 of 3) 10 points Consider the following pressure diagram for a binary liquid containing A and B. 0 1 x A 30 torr 80 torr If 3825 g of A (225 g / mol) and 675 g of B (75 g / mol) are mixed, what is the vapor pressure of B? 1. 52 torr 2. 30 torr 3. 62 torr 4. 10 torr 5. 80 torr 005 (part 2 of 3) 10 points What is the corresponding vapor pressure of A? 1. 80 torr 2. 30 torr 3. 10 torr 4. 52 torr 5. 62 torr 006 (part 3 of 3) 10 points What is the corresponding total vapor pres- sure? 1. 62 torr 2. 10 torr 3. 80 torr

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Gadhia, Tejas – Homework 2 – Due: Sep 18 2007, 11:00 am – Inst: James Holcombe 2 4. 52 torr 5. 30 torr 007 (part 1 of 1) 10 points 1,1-Dichloroethane (CH 3 CHCl 2 ) has a va- por pressure of 228 Torr at 25 C; at the same temperature, 1,1-dichlorotetrafluoroethane (CF 3 CCl 2 F) has a vapor pressure of 79 Torr.
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Homework 02 - Gadhia Tejas Homework 2 Due 11:00 am Inst...

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