Problem: Consider the arrangement of bulbs shown in the drawing. Each of the bulbs contains a gas at the pressure shown.What is the pressure of the system when all the stopcocks are opened, assuming that the temperature remains constant? (We can neglect the volume of the capillary tubing connecting the bulbs.)

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We are asked to determine the pressure of the system when all the stopcocks are opened, assuming that the temperature remains constant.

Three gas flasks are connected via stopcocks to the same horizontal tube. N2 (1.0 liter, 265 torr) is on the left, Ne (1.0 liter, 800 torr) is in the middle, and H2 (0.5 liters, 532 torr) is on the right.


According to Boyle’s Law, an inverse relationship exists between pressure and volume assuming the number of molecules (n) and the temperature (T) are both constant.


The relationship for Boyle’s Law can be expressed as follows:

P1V1 = P2V2

where:

P1 and V1 are the initial pressure and volume values

P2 and V2 are the values of the pressure and volume of the gas after the change.

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Problem Details

Consider the arrangement of bulbs shown in the drawing. Each of the bulbs contains a gas at the pressure shown.

What is the pressure of the system when all the stopcocks are opened, assuming that the temperature remains constant? (We can neglect the volume of the capillary tubing connecting the bulbs.)


Three gas flasks are connected via stopcocks to the same horizontal tube. N2 (1.0 liter, 265 torr) is on the left, Ne (1.0 liter, 800 torr) is in the middle, and H2 (0.5 liters, 532 torr) is on the right.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Chemistry Gas Laws concept. If you need more Chemistry Gas Laws practice, you can also practice Chemistry Gas Laws practice problems.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Cruz's class at USF.