Understanding Graham's Law of Effusion

What does Graham's Law of Effusion describe?

• The inverse relationship between gas volume and temperature

• The direct relationship between gas pressure and volume

• The inverse relationship between the rate of effusion and the gas's molar mass

• The direct relationship between temperature and the rate of effusion

What is effusion in the context of gases?

• The condensation of gas molecules on a surface

• The expansion of gas in a vacuum

• The escape of gas molecules through a small hole

• The process of a gas turning into a liquid

How is the rate of effusion for helium calculated using Graham's Law?

• By comparing it directly to the molar mass of argon

• Through the direct relationship with argon's rate of effusion

• Using the inverse square root of the molar mass ratio of helium to argon

• By multiplying the rate of effusion of argon with helium's molar mass

What does the square root term in Graham's Law represent?

• The pressure difference between two gases

• The ratio of the gases' temperatures

• The volume ratio of the two gases

• The ratio of the molar masses of two gases

Why is it easier to solve for the rate of effusion of helium (r2) rather than argon (r1) in the given example?

• Because argon's rate of effusion is already known

• Because helium's molar mass is easier to calculate

• To avoid flipping the fraction in the equation

• Helium's rate of effusion is not influenced by temperature

What is the significance of the square root of the molar mass ratio in Graham's Law?

• It indicates the direct proportionality to effusion rate

• It determines the exact speed of gas molecules

• It shows the inverse relationship between molar mass and effusion rate

• It calculates the pressure exerted by the gas

What is required to identify an unknown gas using its rate of effusion?

• The gas's reaction with other chemical substances

• The exact temperature and pressure of the gas

• Its rate of effusion compared to a known gas

• The gas's color and physical state

How does the molar mass of a gas affect its effusion time?

• Gases with higher molar mass take longer to effuse

• Lower molar mass gases take longer to effuse

• Higher molar mass gases effuse faster

• There is no relationship between molar mass and effusion time