We applied the methods and used the slide rules to solve a problem involving gas laws. Students also had three questions to answer and hand in as they left class.
Remember, the slide rule will never replace the electronic calculator or computer, but until students have enough practice to understand numbers used in scientific work, it is a great teaching aid. I asked my students to practice multiplying and dividing with it as homework. They were to compare their answers to those obtained by working longhand. Here is a sample problem:
--What is Avogadro's number? My students may look in the lab book, if they do not remember offhand.
--What is the volume of one mole of an ideal gas at standard temperature and pressure (STP)? (How to do this problem is in the notes, too, or it ought to be!)
--What is the volume (ml, L, any volume unit desired) of one molecule (or atom, in the case of noble gases) of ideal gas at STP?
(Remember to use scientific notation, methods of estimation, and then convert your answer back to standard format.)
No comments:
Post a Comment