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MCAT 2022 > Chemistry > Flashcards

Chemistry Flashcards

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MCAT flashcards
1
Q

What is a zero order reaction

A

constant rate

doesn’t depend on concentration of reactant

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2
Q

What can affect a zero order rxn

A

changing temp or adding a catalyst

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3
Q

What would a concentration vs. time graph look like for a zero order rxn

A

straight line

slope=k

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4
Q

What is a first order rxn

A

non constant rate that DOES depend on concentration of reactant

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5
Q

What does a concentration vs. time curve look like for first order rxn

A

non linear

slope for ln[A] vs time=-k

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6
Q

What is a second order rxn

A

non-constant rate that depends on the concentration of reactant

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7
Q

What does the concentration vs. time graph look like for second order

A

non linear

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8
Q

What is an exergonic rxn

A

energy given off

usually has negative free energy

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9
Q

What is an endergonic rxn

A

energy absorbed

Usually has positive free energy

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10
Q

What does it mean if Q

A

reaction proceeds in forward direction

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11
Q

What does it mean if Q=Keq Delta G=0

A

Rxn is in equilibrium

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12
Q

What does is mean if Q>Keq, Delta G>0

A

Rxn proceeds in reverse direction

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13
Q

What does it mean if Keq>1

A

Products favored

more products at eq

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14
Q

What does it mean if Keq=1

A

Products and reactants are in eq

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15
Q

What does it mean if Ke<1

A

Reactants favored

arrow pointing to left, reactants on left

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16
Q

According to Le Chatelier’s Principle what does it mean to increase concentration of reactants or decrease concentration of products

A

Rxn shifts right

17
Q

According to Le Chatelier’s Principle what does it mea to increase concentration of products or decrease concentration of reactants

A

shift rxn to left

18
Q

According to Le Chatelier’s Principle what does it mean to increase pressure on a gaseous system (decrease volume)

A

shifts rxn towards side with fewer moles of gas

19
Q

According to Le Chatelier’s Principle what does it mean to decrease gaseous system (increase volume)

A

Shifts rxn to side with more moles gas

20
Q

Describe an isothermal process

A

Occurs at constant temp

21
Q

Describe adiabatic process

A

Exchange no heat w/ environment

22
Q

Describe isobaric processes

A

occur at constant pressure

23
Q

Isovolumetric (isochoric) process

A

Occurs at constant volume

24
Q

Define enthalpy

A

Measure of potential energy of a system

25
Q

Define entropy

A

Measure of the degree energy has been spread throughout a system

26
Q

If delta G<0 then

A

rxn is spontaneous (forward)

27
Q

If delta G=0

A

rxn is in eq

28
Q

If delta G>0

A

rxn is non spontaneous (reverse)

29
Q

Define the critical point

A

Liquid and gas phases are indistinguishable

30
Q

What is another word for melting

A

Fusion

MCAT 2022 (12 decks)

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