JOURNAL O F CHEMICAL EDUCATION
AIA
VISUAL'AID
VOGADRO
TO GAS LAWS STUDY
% W o r d ~ ~ L ' C A L V l N P . MIDGLEY Lake Villa, Illinois
the AII equal same volumes number of OF gases molecules. have
BOY LL "VW~~'BAROM~TER' qas l h e volume of any vav~es invevsely as tho pmssure. $ ::
c
CHARLESY W ~ % N T I G R A D . ~
THEaccompanying chart is submitted as a possible aid t o the study of the gas laws for elementary students in chemistry and physics. Too often these basic laws are considered with awe by the average student and only by repetition and continual review is the law and the name associated with it &ed in the memory. It seems logical that any time saved in the effort to memorize these facts could be profitably expended in applying them in classroom discussions and experiments. Being a visual aid to memory the chart should be of particular value to those students &ding it difficult to memorize in any other way and, if displayed prominently in the classroom, would serve all students usefully as a rapid review of the laws at a glance. The chart should be useful in another way, it seems, by suggesting to the student without verbally expressing it, that the laws are as "simple as ABC." This helps in removing the psychological barrier to their consideration.
s:: ,l "MORE EQUALS MORE," DALTON K+~~DIFKR~NT' Xu
D ot
The volume of any gas wriw directly as t h e absolute temperahwe. 2
total pressure exerted by a mixtqm is equal t o the sum 0 ) the DIFFERENT pressures uch would w r t if separably confined.
of confined qdses
I
GUY %~sa " LUS~AC LNK K
Words
LwsGas-
combine in the ratio of .mm\\ W ~ Q \ Cnumkrs.
