Mixed Gas Law Problems

A balloon is filled with 35.0 L of helium in the morning when the temperature is 20.0 degrees Celsius. By noon the temperature has risen an additional 25 degrees. What is the new volume of the balloon?

• 38L

• 79L

• 44L

• 36L

There are 135 L of gas in a container at a temperature of 260 ^oC. If the gas was cooled until the volume decreased to 75 L, what would the temperature of the gas be?

• 23^oC

• 144^oC

• 23K

• 144K

Tags

NGSS.HS-PS3-1

6.0 L of gas in a piston at a pressure of 1.0 atm are compressed until the volume is 3.5 L. What is the new pressure inside the piston?

• 1.7 atm

• 0.6 atm

• 21 atm

• 1 atm

A gas occupies 900.0 mL at 150 kPa. What is the new pressure when the gas is compressed to only 500.0 mL?

• 270 kPa

• 270 atm

• 83 kPa

• 83 atm

A gas container is initially at 47 mmHg and 77 K. What will the pressure be when the container warms up to standard temperature?

• 181 mmHg

• 15 mmHg

• 121 mmHg

• 14 mmHg

If a gas is cooled from 323.0 K to 273.15 K and volume is kept constant, what final pressure would result if the original pressure was 750.0 mmHg?

• 634 mmHg

• 887 mmHg

• 887 atm

• 634 atm

What is 50 C in Kelvin?

• 223
• 323
• 100
• 50

One of the following is not a value for R:

• 8.314 J/K·mol

• 62.36 L·mmHg/K·mol

• 5.34 L·kPa/K·mol

• 0.08206 L·atm/K·mol

How many moles of helium are in a gas

sample that has a volume of 500.0 mL at a

pressure of 3.00 atm and a temperature of

298 K?

• 6.13 moles

• 0.613 moles

• 0.0613 moles

• 61.3 moles

If the pressure exerted by a gas at 25 degrees C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?

• .002766 mole
• .0069 mol
• 2.766 mol
• 9.887 mol