Class 3 Flashcards
What is the relative IMF for solids, liquids, gases, and ideal gases?
Solid > Liquid > Gas > Ideal gas
One of the premises of ideal gases is that intermolecular forces are very minimal.
What is more likely to be solid: polar or nonpolar? Why?
Polar because it has more IMF, particles hold together more tightly
What is the phase transition from gas to solid called?
Deposition
Endothermic reactions are always associated with what?
Breaking bonds
What is the equation for heat energy to warm a substance?
q = mc(delta)T
where m = mass (kg)
c = specific heat (J/gK)
What is heat capacity (C)?
C (heat capacity) = mc
where c is the specific heat
What is the specific heat of water?
4.18 J/gK
What is the critical point?
The T/P at which the difference between liquid phase and gas phase is no longer distinct.
What is the triple point?
The T/P at which the solid, liquid, and gas phases of a substance can coexist.
What is unique about the phase diagram for water?
The solid/liquid boundary line angles LEFT because as pressure increases, the water mp decreases. This is called the “ice skating effect” like when the pressure from an ice skate melts the water.
IMF is ________ proportional to V
Indirectly. High IMF is indicative of tightly bound bonds and thus a solid, smaller form.
IMF is ________ proportional to P
Indirectly
P being the force exerted by gas particles on the surface.
Increasing pressure on a substance will cause density to _______.
Increase
IMF is _______ proportional to density
directly
What is vapor pressure?
The force exerted by the gas particles that vaporize from a solid or liquid sample.
Does external pressure have an effect on vapor pressure?
NO NO NO! Air pressure DOES NOT MATTER!
External pressure is ______ proportional to vapor pressure.
Directly
