Skip to main content
Ch.10 - Gases
Chapter 10, Problem 6

The apparatus shown here has two gas-filled containers and one empty container, all attached to a hollow horizontal tube closed at both ends.
a. How many blue gas molecules are in the left container?
b. How many red gas molecules are in the middle container?
c. When the valves are opened and the gases are allowed to mix at constant temperature, how many atoms of each type of gas end up in the originally empty container? Assume that the containers are of equal volume and ignore the volume of the connecting tube. [Section 10.4]

Verified step by step guidance
1
<Step 1: Understand the initial setup.> Identify that there are two gas-filled containers and one empty container, all of equal volume, connected by a tube. The left container has blue gas molecules, and the middle container has red gas molecules.
<Step 2: Determine the initial number of molecules.> Count the number of blue gas molecules in the left container and the number of red gas molecules in the middle container from the given diagram or description.
<Step 3: Consider the mixing process.> When the valves are opened, the gases will mix. Since the containers are of equal volume and the temperature is constant, the gases will distribute evenly across all three containers.
<Step 4: Calculate the distribution of molecules.> Divide the total number of blue gas molecules by three to find out how many blue molecules will be in each container after mixing. Do the same for the red gas molecules.
<Step 5: Conclude the distribution.> State the number of blue and red gas molecules that will end up in the originally empty container after the gases have mixed.>

Verified Solution

Video duration:
3m
This video solution was recommended by our tutors as helpful for the problem above.
Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Gas Laws

Gas laws describe the behavior of gases in relation to pressure, volume, and temperature. Key laws include Boyle's Law, which states that pressure and volume are inversely related at constant temperature, and Charles's Law, which states that volume is directly proportional to temperature at constant pressure. Understanding these laws is essential for predicting how gases will behave when mixed or when conditions change.
Recommended video:
Guided course
01:43
Combined Gas Law

Mole Concept

The mole concept is a fundamental principle in chemistry that relates the amount of substance to the number of particles, such as atoms or molecules. One mole of any substance contains Avogadro's number (approximately 6.022 x 10²³) of particles. This concept is crucial for calculating the number of molecules in each container and for understanding how they will distribute when mixed.
Recommended video:

Diffusion of Gases

Diffusion is the process by which gas molecules spread from areas of higher concentration to areas of lower concentration. In the context of the question, when the valves are opened, the gases will diffuse into the empty container until the concentration is uniform. This concept is important for predicting the final distribution of gas molecules in the containers after mixing.
Recommended video:
Guided course
01:31
Effusion vs Diffusion
Related Practice
Textbook Question

You have a sample of gas in a container with a movable piston, such as the one in the drawing. b. Redraw the container to show what it might look like if the external pressure on the piston is increased from 1.0 atm to 2.0 atm while the temperature is kept constant.

2
views
Textbook Question

Consider the sample of gas depicted here. What would the drawing look like if the volume and temperature remained constant while you removed enough of the gas to decrease the pressure by a factor of 2? (a) It would contain the same number of molecules. (b) It would contain half as many molecules. (c) It would contain twice as many molecules. (d) There is insufficient data to say.

949
views
Textbook Question

Imagine that the reaction 2 CO1g2 + O21g2¡2 CO21g2 occurs in a container that has a piston that moves to maintain a constant pressure when the reaction occurs at constant temperature. Which of the following statements describes how the volume of the container changes due to the reaction: (a) the volume increases by 50%, (b) the volume increases by 33%, (c) the volume remains constant, (d) the volume decreases by 33%, (e) the volume decreases by 50%.

620
views
Textbook Question

Consider the following graph. (a) If curves A and B refer to two different gases, He and O2, at the same temperature, which curve corresponds to He?

599
views
Textbook Question

Consider the following graph. (b) If A and B refer to the same gas at two different temperatures, which represents the higher temperature?

333
views
Textbook Question

Consider the following graph. (c) For each curve, which speed is highest: the most probable speed, the root-mean-square speed, or the average speed?

534
views