Download Chemistry for today. Study guide and student solutions by Spencer L. Seager, Michael R. Slabaugh PDF

By Spencer L. Seager, Michael R. Slabaugh

The 8th variation of the research consultant and scholar suggestions guide, up-to-date to mirror all alterations to the center textual content, exams scholars at the studying goals in every one bankruptcy and offers solutions to all the even-numbered end-of-chapter routines

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It is only possible to disprove one. If the experiments disagree with the mechanism's predictions, the mechanism needs to be discarded, or at least modified. If the experiments and the mechanism agree, we can maintain the mechanism and try some more experiments. The fact that we have found a mechanism that agrees with all of our observations does not mean that we have found the mechanism. Although we may have struggled mightily and been extremely clever in coming up with our mechanism, there are always other mechanisms Fundamentals 25 consistent with the same set of data, and only further experiments will enable us to choose among them.

One can perform experiments to test it. The results of the experiments may or may not confirm the predictions of the mechanism. It is not possible to prove a chemical mechanism, or, for that matter, any scientific theory. It is only possible to disprove one. If the experiments disagree with the mechanism's predictions, the mechanism needs to be discarded, or at least modified. If the experiments and the mechanism agree, we can maintain the mechanism and try some more experiments. The fact that we have found a mechanism that agrees with all of our observations does not mean that we have found the mechanism.

This is an illusion caused by our efforts to portray a higher dimensional system in two dimensions. A trajectory cannot cross itself because solutions to the sorts of ordinary differential equations that occur in chemical kinetics are unique. If a trajectory seems to cross itself in two dimensions, then the system actually has higher dimension (it is not completely determined by two variables). A two-variable plot projects the higher dimensional trajectory onto a plane, giving the appearance of a crossing of the trajectory.

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