1.2.7 Practice - Intermolecular Forces and the Properties of Gases (Practice).docx

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1.2.7 Practice: Intermolecular Forces and the Properties of Gases Practice AP Chemistry Sem 2 Name: Tai Pham Date: 1. A spaceship is found to have a tiny leak that allows the effusion of air into space. Air in the spaceship is a mixture of nitrogen (N 2 ), oxygen (O 2 ), argon (Ar), and trace amounts of other gases. a. Predict which of the three main gases will have the lowest rate of effusion and which will have the highest rate. Explain your answer. (1 point)
b. Predict how the percentages of the gases in the air will change over time. (1 point)
c. Argon is found to effuse through the hole at a rate of 1.6 × 10 –3 mol in 215 s. How much O 2 would effuse through the hole in the same amount of time? 2
d. Suppose the three gases were placed at 1.00 atm and 273 K in closed containers, as shown below. A tiny hole is opened in each container,

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