new learning - phases mostly

Question 1

average kin energy of an ideal gas

Answer 1

KE= 3/2 nRT

Question 2

average speed of an ideal gas

Answer 2

urms =√3RT/M (in kg/mol)

Question 3

density from ideal gas law

Answer 3

p = PM/RT

Question 4

daltons law

Answer 4

Pa= Pt Xa

Question 5

vapor pressure

Answer 5

pressure exerted y evaporated particles above the surface of the liquid

Question 6

solubility will _______ if partial pressure of gas increases

Answer 6

increase

Question 7

how to relate 2 gases speed with their M

Answer 7

r1/r2 = √M2/M1

Question 8

% difference

Answer 8

change in value / original value x 100

Question 9

to correct deviations from ideal gas law

Answer 9

correction values

PV= nRT

(P + n^2a/V^2) (V-nb) = nRT

so if a is large, P would need to decrease to compensate
if b is large, V need to increase to compensate

Question 10

is condensation rate affected by solutes in solvents?

Answer 10

NO, only the evaporation rate is affected

• vapor pressure depression when solutes are in solvent

Question 11

Raoult’s law

Answer 11

vapour pressure depression caused by solutes in solvent

VPa = Xa VP’a

new VP is mole fraction x pure solvent VP

Question 12

does pure solvent evaporate faster than solute solution

Answer 12

yes, this goes hand in hand with BP elevation - if VP is depressed, than more heat isrequired to get VP to reach atmospheric pressure

Question 13

boiling point elevation

Answer 13

change in T = imKb

• m is molality (mol/kg)

Question 14

osmotic pressure

Answer 14

ii= i M(mol/L)RT

osmotic pressure is the “sucking” pressure

opposes hydrostatic pressure

Question 15

dilution

Answer 15

M1V1=M2V2

Question 16

when is enthalpy equivalent to heat

Answer 16

usually on MCAT, when pressure is constant (isobaric)

Question 17

heat capacity

Answer 17

just cxm (bigger objects have more heat capacity)

Question 18

STP

Answer 18

0 C —> 273 K and 1atm

Question 19

non-associative learning

Answer 19

sensitivation and habituation

Question 20

operant conditioning vs classical conditioning

Answer 20

operant–> associating behaviour with consequences, clasical –> associating unconditioned stim to unconditioned response ( involuntary droooling to bell)

Question 21

ratio vs interval

Answer 21

of responses, interval = time

Question 22

fovea vs macula

Answer 22

fovea is IN the macula and is the highest vision resoltuion

Question 23

HH equation

Answer 23

pH= pKa + log [A-]/[HA]

Question 24

ka, kb and kw

Answer 24

kw= ka kb

Question 25

pka pkb and 14

Answer 25

pka + pkb = 14

Question 26

weak acids

Answer 26

ka = less than 1 –> they dont fully dissociate

Question 27

what’s the trick to solving “calculate the pH of a 1.00M solution of acetic acid”

Answer 27

identify that is not a strong acid so it will not fully dissociate

ICE table

and then assume that x «&laquo_space;1

ka= X^2/1.00 –> solve for x

Question 28

why if an acid is really strong is its conjugate base weak?

Answer 28

bc kb x ka = kw

so if ka if large than kb must be small indicating a weak base

Question 29

strong strong

Answer 29

neutralize + water

Question 30

self-serving bias

Answer 30

i failed test bc not enough sleep, was late bc traffic

but I got a good grade bc I studied hard, and im on time bc thats who I am

Question 31

cognitive bias

Answer 31

systemic error in thinking - affects decisions and judgments ( you believe something)

Question 32

groupthink

Answer 32

Groupthink occurs in groups when individual thinking or individual creativity is lost or subverted to stay within the comfort zone of the consensus view.

group members modify their opinions to match what they believe is the group consensus

Question 33

group polarization

Answer 33

move to a more extreme point of view

Question 34

zeff

Answer 34

how much attraction the outermost electron feels to the positive nucleus