MCAT CHEM 2
Card Set Information
MCAT CHEM 2
mcat flashcards chemistrye
studying to be a doc
how will increasing pressure affect the following rxn
favor forward rxn
(t/f) increasing the pressure of a system will shift equilibrium so as to increase number of moles produced
false, increase pressure will shift in favor of less moles of gas
how would increasing temp affect
favor reverse rxn
isolated system? close system? open system?isothermal process?
isolated- CAN NOT exchange energy nor matter with surrounding
closed- CAN NOT exchange matter
open-CAN exchange both
isothemal process- under constant temp
process in which no heat exchange occurs btwn the system and surounding
formula for calculating heat (q) absorbed or released by a process
formula for delta H
sum of delta H
of products -sum of delta H
whats standard heat of formation (delta H
the enthalpy change that occurs when one mole of a compound is formed from its elements in their standard states.
bond dissociation energy?
the amount of energy required to break a particular bond in one mole of gaseous molecules
measure of disorder or randomness of a system
when does a system reach maximum entropy
at its equilibrium
under what conditions will rxn with + delta H and + delta S be spontaneous?
under what conditions will rxn with - delta H and -delta S be spontaneous
whats the value of delta G at equilibrium?
standard free energy delta G
delta G of a process at 25
C, 1 atm, and 1 M concentration for all reactants
(t/f) delta G
(t/f) once the rxn starts
delta G=delta G
whats standard pressure in atm, mmHg, torr?
1 atm = 760 mmHg = 760 torr
ideal gas law
unit of density for gas, and formula
in what condition is the ideal gas most corret
low pressure, high temp
how do actual volume and predicted volume of gas compare at moderately high pressure? extremely high pressure?
moderate- less than predicted
extreme more than predicted
how do actual volume and ideal volume of a gas compare at very low temp
less than predicted
Dalton's law of partial pressure
total pressure is sum of partial pressure of each component
formula for partial pressure of A
Xa=mol of A/total mol
what is effusion
flow of gas particles under pressure from one container to another through a small opening
(t/f) the rate of effusion for two molecules are directly proportional to the square root of their molar masses.
false, the rate of effusion are inversely proportional, just as in diffusion
mixture of immisible liquids which are broken up into extremely small particles