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Speed of Reaction vs Number of Collisions Required

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1.) Compare two chemical reactions, one requiring simultaneous collision of three molecules and the other requiring a collision between two molecules. Assuming all else is equal, which reaction should be faster? Explain your answer. Can you provide an example?

2.) Why do foods cook faster in a pressure cooker relative to an open pot of boiling water?

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Solution Summary

370 words give an example to illustrate whether reactions requiring less molecular collisions are faster, as well as how a pressure cooker speeds cooking times.

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1.) Compare two chemical reactions, one requiring simultaneous collision of three molecules and the other requiring a collision between two molecules. Assuming all else is equal, which reaction should be faster? Explain your answer. Can you provide an example?

Here's an example of a termolecular reaction, a reaction involving the simultaneous collision of three molecules, ions, or atoms. This is the oxidation of nitric oxide to form nitrogen dioxide.
2 NO + O2 -------> 2 NO2

Here's an example of a bimolecular reaction. It is the oxidation of sulfur to form sulfur ...

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