| 21. | Such a collapse ( a " decay event " ) requires a specific activation energy.
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| 22. | The activation energy of the electrocyclization is 73 kJ mol " 1 for stilbene.
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| 23. | Activation energy may also be defined as the minimum energy required to start a chemical reaction.
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| 24. | The complete analysis method calculates the pre-exponential factor and the activation energy at several coverages.
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| 25. | Thus, the activation energy of the overall reaction is lowered, and the rate of reaction increases.
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| 26. | The relationship between MFI and temperature can be used to obtain the activation energies for polymers.
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| 27. | In subsequent steps, the activation energy is only from the intermediate to the next transition state.
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| 28. | First we assume the pre-exponential factor and the activation energy to be independent of the coverage.
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| 29. | Thermite has a very high activation energy.
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| 30. | In order to react there has to be a source of activation energy, such as a spark.
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