17 May Gas Laws
This week we covered gas laws in chapter 6. Please review this material and complete the following practice problems. Show all calculation setups, including units, for all problems.
1. A sample of methane gas, CH4, occupies 3.25 L at temperature of 19.0 oC. If the pressure is held constant, what will be the temperature be if the volume expands to 10.00 L?
2. A sample of oxygen gas occupies 1.9 L at pressure of 1156 torr. What volume will it occupy when the pressure is changed to 912 torr and temperature remains constant?
3. The pressure of hydrogen gas in a constant volume cylinder is 5.01 atm at 21.0 oC. What will be the pressure if the temperature is raised to 70.0 oC?
4. A 988 mL sample of air is at 852 mm Hg and 34.1 oC. What will the temperature of this gas be, in Fahrenheit, at 955 mm Hg and a volume of 602 mL?
5. A sample of a gas occupies 9850 mL at STP. What volume will the gas occupy at 95 oC and 675 torr?
LAB EXERCISE 2 Name_____________________________
6. A sample of nitrogen gas occupies 28.5 L at STP. How many moles of nitrogen are present?
7. A 795.0 mL volume of hydrogen gas is collected at 23 oC and 1055 torr. What volume will it occupy at STP?
8. What would the pressure be of 25.0 g of chlorine gas at –10.0 ºC in a 4.50 L container?
9. Calculate the density of CH4 at STP.
10. A volume of 495 mL of argon gas was collected at 21.0 oC and 779 torr. What does this sample weigh?
