Module Six Sample Exam

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Module Six Part E Gas Law Problems                            10 points

Boyle’s Law

1.  A sample of a gas has a volume of 100 mL when measured at 25 oC and

760 mmHg.  What volume will the gas occupy at 25 oC and 380 mmHg?

Charles Law

2. The volume of a gas is 100.0 mL at 27 oC.  At what temperature in degrees Celcius would the volume of the gas be 200.0 mL, assuming the pressure remains constant.

Dalton’s Law of Partial Pressures

3. The volume of hydrogen collected over water is 100 mL at 25 oC and 763.8 torre.  Calculate the dry volume in milliliters of hydrogen at standard pressure with the temperature remaining constant.  (The partial pressure of water vapor at 25 oC is 23.8 torre.)

Gay-Lussac’s Law

4.  A sample of gas occupies 100.0 L at 710.0 torre and 27 oC.  Calculate the pressure in torre if the temperature is changed to 127 oC while the volume remains constant.

Ideal Gas Equation-Combined Gas Laws

5. Calculate the number of moles of nitrogen gas in a 5.00 L cylinder at 27 oC and 4 atm pressure. R = 0.0821 L atm/ K mole ) How much does this volume of gas weigh?