WEEK 6 Flashcards
What can the properties of gases tell us?
Because gases atoms/ molecules are generally not in contact, it allows us to view how they behave without the influence of other particles
What are the three key points that allow/make up pressure?
- Any object that strikes a surface exerts force against it
- At any temp>0K, atoms/molecules are always in motion
- Atoms and molecules exert force when they collide together
What is pressure?
The total of collisions is the what is known as pressure (p)
What is the equation for pressure?
P=F/A where F= force, per unit of area= A
What are the SI units for the equation of pressure?
F=newtons(N) and A= m^2 therefor p=Pa 1Pa=1kg m^-1 s^-1
What is Boyles law?
PV=k
What is the formula that shows the relationship between pressure and volume?
p1xV1=p2V2
Explain the relationship between pressure and volume
As pressure increases volume decreases. It is inversely proportional
What is Charles’ law?
As gas heats up it expands
What is the formula to Charles’ law?
V1xT1=V2xT2 at constant temp
V1xT2=V2xT1 T is Kelvin
What is Avogadro’s law?
As the number of moles increases the volume of gas increases at constant P and T
What are intermolecular forces?
Forces between molecules. They are relatively weak bonds that exist between, atoms, molecules and ions.
What are the best examples to demonstrate intermolecular forces?
Halogens, especially F2 and Cl2 which are diatomic gases
Why do Halogens with different states react differently when exposed to different pressures?
It is due to the balance between molecular kinetic energies and intermolecular forces. When average KE remain large enough, molecules remain separated from each other(therefor gas). When the intermolecular forces are large enough molecules remain closer to each other(therefor solid/liquid)
What are the different types of intermolecular forces?
-Dispersion
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