Physical significance of entropy or of the second law

by Joseph Frederic Klein

grams; the corresponding numbers in English units are, approximately,

= number of molecules in one cubic foot of an ideal gas and

= number of molecules in one pound of an ideal gas. Assuming air to be an ideal gas and its "apparent" molecular weight about 28.88, the number of molecules in one pound of air would be

.

Substituting the numerical value of universal constant

in Eq. (10) we get Eq. (28).