Gas Laws Quiz #1

8 Questions  I  By Robert Stine
Quiz on gas laws # 1 includes questions on Boyle's Law. Charles' Law, Lussac's Law, and the Combined Gas Law. Identify the law you need to solve the problem and solve the problem. Use classroom rules for rounding and include units in your answer. Example: If 6 liters of a gas at 2. 0 atm is compress the gas to have a new volume of 5 liters, what is the new pressure? This is a Boyle's Law Problem so P1V1 = P2V2(2. 0)(6) = (P2)(5)P2 = 2. 4Express the answer as 2. 4 atmNote rounding is important numbers greater than 1 are rounded to the tenths place (1 = 1. 0, 5. 85 = 5. 9 etc. . . ) and numbers less than 1 are rounded to one place after the first non zero (0. 000567 = 0. 00057, 02875 = 0. 29)Units are expressed after the number as above. Include a space in between the number and the unit. 2. 4 atm not 2. 4atm. You can miss 1 question and earn the Certificate of Achievement.

  
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1.  A gas has a starting pressure of 780mm-Hg and 70 degrees Celsius, with an unknown starting volume. The gas is able to expand and it’s final volume was 100 ml, the final pressure was 750mm-Hg and the final temp was 50 degrees Celsius. What was the initial volume in mL?
2.  What is the temperature in Kelvin when a gas that occupies 1L at 15 degrees Celsius is compressed to .5L?
3.  A gas in a balloon that has a volume of  5 L is at a pressure of 0.7atm. The gas is able to expand at a constant temp of 10 degrees Celsius until the pressure is at 0.5atm. What is the final volume of the box?
4.  A sample of gas occupies 15L at 300 degrees kelvin and 350kPa. What is the pressure in kPa if the temperature rises to 500 degrees kelvin and the volume to 30L?
5.  A 700 ml sample of helium is warmed from 60 to 80 degrees Celsius. What is the new volume in mL of the sample if the pressure remains as a constant, of 5 atm.
6.  If a gas is cooled from 290 to 250 degrees kelvin and the volume is kept at a constant volume of 780ml.What was the initial pressure in mm-Hg if the final pressure is 810 mm-hg?
7.  A gas is cooled from 350 to 300  degrees kelvin, with a constant volume of 5L. What would the final pressure of the gas be in mm-Hg if the initial pressure measures at 850 mm-hg?
8.  A 3.5 L sample of an unknown gas is at a pressure of 900kPa. If the pressure increases to 1013 kPa at a constant temperature of 150 degrees kelvin, What will the new volume be?
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