Final Chemistry Notebook

Then substitute them into the constant ratio of Charles' law:
When using Charles' law, remember that volume and Kelvin temperature vary directly; therefore, an
increase in either requires a proportional increase in the other.
2. A gas occupying 660 ml at a laboratory temperature of 20°C was refrigerated until it shrank to 125
ml. What is the temperature in degrees Celsius of the chilled gas?
660/20c = 125ml/t
+273
660ml/293 = 125/t
Gay-Lussac's Law
36625=660t
t=55.4924
-273
t=218.494
p =200c
-200 C
This relationship between temperature and pressure is known as Gay-Lussac's law. It states that if
the volume of a container is held constant as the temperature of a gas increases, the pressure inside
the container will also increase. As with the other gas laws, this one can be represented in the form of
an equation:
P1 = P2
T2
Recall that we use 1s and 2s to indicate the quantities before (1s) and after (2s) a change has taken
place. Also, note that the units for pressure do not matter, as long as they are the same throughout
the entire equation. The units for temperature must be Kelvins or the equation will not work. This is
because the Kelvin scale is an absolute scale - it doesn't go negative. Finally, this equation only
works for an ideal gas. Most gases that surround you and me behave very much like ideal gases, so
we can use this equation as an approximation for the gases we encounter.
T2
126