Van der Waals Equation Video Lessons

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Problem: To study a key fuel-cell reaction, a chemical engineer has 20.0-L tanks of H 2 and of O2 and wants to use up both tanks to form 28.0 mol of water at 23.8°C. (b) Use the van der Waals equation to find the pressure needed in each tank. 

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The Van der Waals' Equation is as follows:

where a is the polarity coefficient, which accounts for the attractive or repulsive interactions of the gas molecules, and b is the size coefficient, which accounts for the size of the individual gas molecules. This equation show how real gases deviate from ideal behavior.

Let P + n2a/V2Pvdw, the van der Waals pressure. We can rearrange this equation to get Pvdw:

The reaction of H2 and O2 to form H2O is as follows:

2 H2(g) + O2(g) → 2 H2O(g)

We're given T = 23.8˚C + 273.15 = 296.95 K.

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Problem Details

To study a key fuel-cell reaction, a chemical engineer has 20.0-L tanks of H 2 and of O2 and wants to use up both tanks to form 28.0 mol of water at 23.8°C. 

(b) Use the van der Waals equation to find the pressure needed in each tank. 


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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 Van der Waals Equation concept. You can view video lessons to learn Van der Waals Equation. Or if you need more Van der Waals Equation practice, you can also practice Van der Waals Equation practice problems.

What textbook is this problem found in?

Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.