Chapter 11.3­4 notes2013.notebook March 26, 2014

Mar 6­8:47 AM

1. Go over HW2. Practice Problems???3. Gas Stoich notes & Graham's Law Notes4. HW 

Feb 17­11:27 AM

1. On a warm day, an amusement park balloon is filled with 47.8 g of helium. The temperature is 33°C and the pressure in the balloon is 2.25 atm. Calculate the volume of the balloon

1.

Feb 17­11:28 AM

1. When filling a weather balloon with gas you have to consider that the gas will expand greatly as it rises and the pressure decreases. Let‛s say you put about 10.0 moles of He gas into a balloon that can inflate to hold 5000.0L. Currently, the balloon is not full because of the high pressure on the ground. What is the pressure when the balloon rises to a point where the temperature is -10.0°C and the balloon has completely filled with the gas.

2.

Feb 17­11:28 AM

1. If you were to take a volleyball scuba diving with you what would be its new volume if it started at the surface with a volume of 2.00L, under a pressure of 752.0 mmHg and a temperature of 20.0°C? On your dive you take it to a place where the pressure is 2943 mmHg, and the temperature is 0.245°C?

3.

Feb 17­11:28 AM

1. An aerosol can contains 400.0 ml of compressed gas at 5.2 atm pressure. When the gas is sprayed into a large plastic bag, the bag inflates to a volume of 2.14 L. What is the pressure of gas inside the plastic bag?

4.

Feb 17­11:28 AM

1. Have you ever wondered what the pressure is under the glass bell jar when the vacuum pump is turned on? One way to measure it would be to see how a balloon changes when it is inside. At the beginning of the experiment you note that the volume of the balloon is 560.0 mL under standard pressure. When you turn on the vacuum pump the balloon grows to 780.0 ml. What is the pressure under the bell jar at this point

5.

Chapter 11.3­4 notes2013.notebook March 26, 2014

Feb 17­11:29 AM

1. You discover in an experiment the mass of a gas is 14.2g. You use a manometer you found in a lab drawer to measure the pressure at 725 torr. The volume of the container holding the gas is 475 mL and the temperature of the room is 21oC. What is the molar mass of the gas?

6.

Feb 17­11:29 AM

1. A 325g block of dry ice (solid CO2) vaporizes to a gas at room temperature. Calculate the volume of the gas at 24oC and 32 psi.

7.

Feb 17­11:29 AM

1. The density of a gas is 52g/L. Given a balloon full of the 6 moles of the gas at STP, how many grams of the gas do you have?

8.

Apr 10­10:17 AM

Apr 10­8:29 AM Mar 7­8:10 AM

Quiz In an experiment you find the mass of a gas to be 27 g. Using the supplies in your lab drawer, specifically the manometer, you measure the pressure of the gas in the enclosed system to be 43.2 psi. If the volume of the system is 587 mL and the temperature of the room is 23oC. What is the molar mass of the gas?

Chapter 11.3­4 notes2013.notebook March 26, 2014

Mar 26­8:46 AM Mar 26­8:39 AM

Braingenie reminder

Free NHS tutoring Tuesdays & Thursdays

3:15-4:15

Mar 7­8:44 AM Mar 13­12:22 PM

Mar 13­12:22 PM Mar 26­7:48 AM

Chapter 11.3­4 notes2013.notebook March 26, 2014

Apr 15­9:55 AM

Gas Stoichiometry Practice Worksheet 

KEY

Mar 26­10:57 AM