HW6 - Niu(qn269 – Homework 6 – McCord –(91750 1 This...

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Unformatted text preview: Niu (qn269) – Homework 6 – McCord – (91750) 1 This print-out should have 32 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points A gas is enclosed in a 10.0 L tank at 1200 mm Hg pressure. Which of the following is a reasonable value for the pressure when the gas is pumped into a 5.00 L vessel? 1. 0.042 mm Hg 2. 24 mm Hg 3. 600 mm Hg 4. 2400 mm Hg 002 10.0 points Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m below the surface, the pressure is 301 kPa; and so forth. If the volume of a balloon is 3 . 5 L at STP and the temperature of the water remains the same, what is the volume 56 . 53 m below the water’s surface? Answer in units of L. 003 10.0 points At standard temperature, a gas has a volume of 350 mL. The temperature is then increased to 137 ◦ C, and the pressure is held constant. What is the new volume? Answer in units of mL. 004 10.0 points A sample of ideal gas occupies 250 mL at 25 ◦ C and 740 torr. What is its volume at STP? 1. 280 mL 2. 235 mL 3. 223 mL 4. 250 mL 5. 266 mL 005 10.0 points A gas at 1 . 96 × 10 6 Pa and 14 ◦ C occu- pies a volume of 354 cm 3 . At what tem- perature would the gas occupy 516 cm 3 at 2 . 7 × 10 6 Pa? Answer in units of ◦ C. 006 10.0 points A sample of gas in a closed container at a temperature of 96 ◦ C and a pressure of 5 atm is heated to 338 ◦ C. What pressure does the gas exert at the higher temperature? Answer in units of atm. 007 10.0 points What is the percent yield if 4.51 moles of CH 4 produces 16 L of CO 2 at STP? CH 4 + 2 O 2 → CO 2 + 2 H 2 O 1. 1.26% 2. 36.4% 3. 78.1% 4. 15.8% 5. 6.31% 008 10.0 points If I have 44.8 liters of nitrogen gas at standard temperature and pressure, how much will it weigh?...
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This note was uploaded on 09/01/2009 for the course PHY M taught by Professor Staff during the Spring '09 term at University of Texas.

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HW6 - Niu(qn269 – Homework 6 – McCord –(91750 1 This...

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