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Lec9 - Smog in Los Angeles The graph shows how the...

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Smog in Los Angeles The graph shows how the concentrations of nitric oxide, nitrogen dioxide, ozone, and volatile organic compounds vary on a typical smoggy day. What is the cause of this variation? Chemical Kinetics provides the answer. See Gilbert pp. 674 – 677! 2 Ch 14 Chemical Kinetics Which prediction regarding chemical reactions is not correct? A) The rate increases with increasing temperature. B) The rate usually increases with increasing concentrations of reactants. C) The rate depends on G o reaction = G o products – G o reactants The reaction rate is a measure of how fast a reaction occurs. It is proportional to the change in concentration divided by the time interval .
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3 The rate increases with increasing temperature. Will learn why some reactions are more temperature sensitive than others. Will be able to calculate rates at different temperatures. Will learn why reaction rates can be increased at low temperatures by using substances called catalysts. 4 The rate usually increases with increasing concentrations of reactants. Will learn why. Will learn how to use variations in concentration to determine reaction mechanisms, rate laws, and rate constants.
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5 The rate depends on G o reaction = G o products – G o reactants NO!
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