of Chemistry I: Honors
Fall 2013, Unique 52195
Lecture Summary, 29 August 2013
discussed basic problem solving techniques. We covered the
importance of careful analysis of units and the magnitude of the
result. Whenever you solve a problem, you should look at your
final answer and ask yourself qualitiative questions about whether
answer makes any sense. Do the units make sense? Should
number be > or < 0? Should it be > or < 1?
the magnitude of the number make sense? If your number doesn't
make good physical sense, then you have made a mistake that you need
go back and find. Getting into this habit will allow you to
complex problems and have confidence in your answer, even if you
know what it is.
Matter and Energy: Matter is neither created or destroyed, and energy is conserved. Under conditions of very small mass and very large energy, energy and matter can be converted to one another using Einstein's E=mc2, but this is not something we usually care about in chemistry. Matter can be rearranged so that it takes on very different physical properties, i.e. combining hydrogen and oxygen gas into water vapor. Chemistry is the science of figuring out how this conversion takes place.