Gas Laws Review Worksheet

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Honors Chemistry: Gas Laws Review Worksheet

Combined Gas Laws

1. A gas is at 1.33 atm of pressure and a volume of 682 mL. What will the pressure be if the volume is reduced to 0.419 L? (2.16 atm)

2. Nitrogen gas is being held in a 14.3 m3 tank at a temperature of 62oC. What will the volume be when the temperature drops to 24oC? (12.6 m3)

3. A gas storage tank is a 1.72 atm and 35oC. What temperature is the gas at if the pressure increases to 2.00 atm? (354 K)

4. A gas with a volume of 1.00 L is at 135oC and 844 mm Hg. What is the volume if the conditions change to 14o C and 748 mm Hg? (0.794L)

5. Calculate the mass of 162 L of chlorine gas, measured at STP. (513 g)

Dr. Mihelcic Honors Chemistry 1 2008-2009 Ideal Gas Law

6. Find the pressure in mm Hg produced by 2.35 g of carbon dioxide in a 5.00 L flask at 18oC. (194 mm Hg)

7. How many grams of carbon monoxide must be placed into a 40.0 L tank to develop a pressure of 965 mm Hg at 23oC? (58.5 g)

Ideal Gas Law: Density and Molar Mass

8. At what Celsius temperature will argon have a density of 10.3 g/L and a pressure of 6.43 atm? (31 deg. C)

9. The density of an unknown gas at 20oC and 749 mm Hg is 1.31 g/L. Calculate the molar mass of the gas. (32.0 g/mol)

10. Two organic liquids are analyzed, and both are found to be 85.7% carbon and 14.3% hydrogen by weight. At 750 mm Hg and 150oC, both are vapors. At these conditions, an 800.0 mL bottle holds 1.60 g of Compound A, while the same bottle holds 2.22 g of Compound B. Determine the molecular formulas of both compound A and B. (Emp. Formula = CH2; molecular formulas = C5H10 and C7H14)

Dr. Mihelcic Honors Chemistry 1 2008-2009 Gas Laws and Stoichiometry

11. Given the following UNBALANCED equation:

NO (g) + O2 (g)  N2O4 (g)

a) At constant T and P, how many L of NO will react with 2.4 L of O2 to form N2O4? (4.8 L)

b) At STP, how many L of N2O4 are formed from the reaction of 4.0 moles of NO? (44.8 L)

12. a) Write the balanced equation for the decomposition of liquid water to its elements.

b) How many liters of hydrogen gas, measure at 0.940 atm and 32oC, will result from the decomposition of 10.0 mL of liquid water? (14.8L)

Graham’s Law

13. Rank the following from the highest rate of effusion/diffusion to the lowest: C2H6, CH4, C2H4, and C3H8, and then explain your reasoning. (C3H8 > C2H6 > C2H4 > CH4 ranked by molar mass)

Dr. Mihelcic Honors Chemistry 1 2008-2009