Gas Laws

A sample of hydrogen occupies a volume of 1.2 L at a pressure of 425 kPa. If the temperature of the gas is kept constant, what would be new volume of gas be at 615 kPa?

• 0

• 0.83 L

• 1.2 L

• 0.435 L

Which formula is Avogadro’s Law?

• P1V1 = P2V2

• V1/T1 = V2/T2

• V1/n1 = V2/n2

• Ptotal = P1+P2+P3

The temperature of a sample of helium at 85.0 kPa is 37°C. If the volume of the gas remains constant, at what temperature (in °C) would the pressure of the gas be at?

• 16 kPa

• 95.3 kPa

• 45.98 kPa

• 98.0 kPa

A sample of nitrogen occupies a volume of 0.650 L at 20.0°C. What volume would the gas occupy at 40.0°C if the

pressure remains constant?

• 0.73

• 1.3

• 0.69

• 1.67

Which formula is Boyle’s Law?

• P1V1 = P2V2

• V1/T1 = V2/T2

• V1/n1 = V2/n2

• Ptotal = P1+P2+P3

Which formula is Charles Law?

• P1V1 = P2V2

• V1/T1 = V2/T2

• V1/n1 = V2/n2

• Ptotal = P1+P2+P3

Which formula is Dalton’s Law?

• P1V1 = P2V2

• V1/T1 = V2/T2

• V1/n1 = V2/n2

• Ptotal = P1+P2+P3

A 250 mL sample of oxygen is collected over water at 25C and 760.0 torr. What is the pressure of the dry gas alone? Hint. P vapor pressure is 23.8 mmHg

• 2.67

• 23

• 14.84

• 3.7

A 2.0L sample of air is collected at 298 K and then cooled to 278K. The pressure is held constant. What is the new volume?

• 14.2L

• 0.52L

• 1.9L

• 0.8L

A temperature of -25°C is equal to:

• 248 K

• -25 K

• 25 K

• 298 K