Class 3 Flashcards by Delayne van Dijk

What are IMF dependent on?

BP
MP
Vaporizing Pressure

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Which state has the strongest IMF?

solid has the strongest gas has the weakest

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What is the terms for solid>liquid

Melting/fusion

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What is the term for liquid to gas?

Vaporization

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What is the terms from gas to liquid?

Condensation

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What is the term from liquid to solid?

Freezing/crystallization

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What is the term from solid to gas?

Sublimation

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What is the term form gas to solid?

Deposition

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What is melting and boiling point proportional to?

Pressure

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What is the critical point?

Difference between liquid and gas doesn’t exist

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What is the triple point?

When all 3 phases co exist in equilibrium

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For water how does the relationship between melting point and Pressure look like?

MP is inversely proportional to pressure

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What is temperature?

Average kinetic energy of a molecular motion

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What could happen if you change the heat of a substance?

Change phase (potential energy)
Change temp (kinetic energy)
- but cant to both at the same time

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What are the 2 q equations?

q=n x deltaH of phase change

q=mc(change in T)

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In a phase diagram what is happening when there is a slope and a plateau?

Slope: no change in IMF, no breaking IMF just increasing temp

Plateau: Changing IMF and breaking IMF, no change in temp

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What is the specific heat of water?

4.18 J/gC

What is heat capacity?

Specific object or system J/C or J/K

What is density?

How condensed a substance is

What is the equation for density?

p=m/v

For density how does external P, T and IMF relate to density?

External P: directly proportional to density
External T: is indirectly proportional to density
IMF: directly proportional to density

What is the vapour pressure?

Force exerted by gas particles for a solid to liquid

-not dependent on other substances in a closed or open system

For vapour pressure how does external P, T and IMF relate to vapour pressure?

External P has no effect on VP
External T: if increase temp it increases evaporation and increases VP
IMF: if IMF increases it lowers evaporation and decrease PV

Whaat is BP?

When condensation/vaporization phase transition occur

-when VP=Patm

For BP how does external P, T and IMF relate to BP?

External P directly proportional to BP IMF directly proportional to BP External T no effect

What is melting/Freezing?

MP and FP have the same value

For MP/FP how does external P, T and IMF relate to MP/FP?

External P: directly proportional too MP/FP | IMF: directly proportional to MP/FP

What is the difference between solute and solvent?

Solute: lower quantity Solvent: increased quantity

What happens when solid and ligand are in water?

solubility is proportional to temp and not affected by pressure

What happens when gas solutes are in water?

Solubility is proportional to temp and are affected by pressure

What happens when there are electrolytes in water?

Certain core always going to be soluble

What is the kinetic molecular theory of gases?

Ideal gas has 0 IMF - has particles with negligible volume compared to their container size - has an average KE proportional to temp - has elastic collision where no KR is lost between particles and container wall *this creates pressure

What is avogadros law?

V of ideal gas is proportional number of particles in the container at given temp and pressure regardless of the gas -V proportional to mols

How much does one mol of any gas equal?

Occupies 22.4l=L at STP

What is boils law?

P inversely proportional to V at constant mol (n) and T

What is Charles law?

T proportional to V at constant mol and P

What is Gay-Lussae law?

P proportional to T at constant mol and V

What is the ideal gas law?

Is a snap shot of the gas PV=nRT -R=0.08L/atm/mK

What is daltons law?

Total P of a gas mix= the sum of the partial pressures | pp of gas are proportional to mol fraction

What is grams law?

Rate of diffusion or effusion of a gas in inversely treated to the root of its molar mass - heavy particles move slow - lighter particles move quick

What is the difference between diffusion and effusion?

diffusion: movement go gas through other gas Effusion: Movement of gas into vacuum (where P=0atm)

What do we always have to remember with grams law?

Pideal is always greater than Preal Videal is alway greater than Vreal