Difference between revisions of "Lab Gas Laws"

Revision as of 13:31, 30 March 2020

Gas Laws Demos

The in-person version of this lab has ~ 10 demo stations for which each group of student will rotate through. At each station are instructions. In a best case scenario, each demo should be documented in your lab notebook under the demo name heading. Some demos require additional calculations.

Chapter 5 material: The content associated with these demos comes from all different sections in this chapter. Reference will be made to the section, but you will only be responsible for the specific information discussed in the demo activity.

Diffusion of Gases

Watch this video --> https://youtu.be/Rf9j0ztzcs4

Write out the reaction that occured...

what is the molecular mass of HCl -->
what is the molecular mass of NH₃ -->
Eq. 5.17 indicate that the rate at which the gases "diffuse" is inversely proportional to the molecular mass. This means that because HCl is heavier than NH₃, it will move slower and as a result the NH₄Cl formed will not be in the center, but closer to the HCl side due to the fact that NH₃ is moving faster. If you plug your molecular masses into Eq 5.17, you will see the the ratio r(NH₃)/r(HCl) ~ 1.4, so the NH₃ travels 1.4x the distance that HCl would have traveled.

Take home: the heavier the gas the slower it moves, the lighter the gas the faster it moves.

The Amazing bottle

Watch this video --> https://youtu.be/pDtWRrGj6qk

Cloud in a Bottle

“Throwing” air

Liquid Nitrogen

___ Boyle’s Law

___ Charles’ Law

___ Ideal Gas Equation

___ Butane: liquid or gas?

___ Density of Gases

___ Crushing Soda Cans

___ Evacuation – sucking up a balloon

___ Methanol Combustion

___ What is it…a nebulizer?

___ Cartesian Diver

@@ Line 10: / Line 10: @@
 ::*what is the molecular mass of HCl -->
 ::*what is the molecular mass of NH<sub>3</sub> -->
-::*Eq. 5.17 indicate that the rate as which the gases "diffuse" is inversely proportional to the molecular mass. This means that because HCl is heavier than NH<sub>3</sub>, it will move slower and as a result the NH<sub>4</sub>Cl formed will not be in the center, but closer to the HCl side due to the fact that NH<sub>3</sub> is moving faster. If you plug your molecular masses into Eq 5.17, you will see the the ratio r(NH<sub>3</sub>)/r(HCl) ~ 1.4, so the NH<sub>3</sub> travels 1.4x the distance that HCl would have traveled.
+::*Eq. 5.17 indicate that the rate at which the gases "diffuse" is inversely proportional to the molecular mass. This means that because HCl is heavier than NH<sub>3</sub>, it will move slower and as a result the NH<sub>4</sub>Cl formed will not be in the center, but closer to the HCl side due to the fact that NH<sub>3</sub> is moving faster. If you plug your molecular masses into Eq 5.17, you will see the the ratio r(NH<sub>3</sub>)/r(HCl) ~ 1.4, so the NH<sub>3</sub> travels 1.4x the distance that HCl would have traveled.
 :Take home: the heavier the gas the slower it moves, the lighter the gas the faster it moves.