Name: ________________________
Chemistry 100, Section B
Problem set two, due November 2, 2005

Show your work and express your answers in the correct number of significant figures. Be sure to include units when appropriate.

1. Suppose you have a rigid steel gas cylinder with a volume of 40.0 L. At room temperature (22 °C) the pressure reads 756 mm Hg. A fire breaks out, causing the temperature to rise to 325 °C. What pressure would develop in the cylinder?

2. Suppose you have 925 mL of a gas at a pressure of 710 mm Hg at 25.0^oC. If the temperature increases to 30.0^oC and you decrease the pressure to 72 mm Hg, what would the new volume be?

3. What is the partial pressure of nitrogen in a mixture of 25% nitrogen, 50% oxygen, and 25% helium, when the total pressure is 4 atm?