2.2 Reaction Feasibility Flashcards

1
Q

what are the conditions for the standard state of a substance to be in?

A

a pressure of 1 atmosphere
298 K

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2
Q

degree of entropy in solids and gases

A

solid - low entropy (disorder)
gas - high entropy (disorder)

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3
Q

degree of entropy at the melting point and boiling point

A

there is a rapid increase in entropy at MP
an even more rapid and larger entropy at BP

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4
Q

what is entropy affected by?

A

temperature
as temp increases, entropy increases

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5
Q

what happens when heat is released by a reaction to the surroundings?

A

entropy increases

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6
Q

what happens when heat is absorbed by a reaction from the surroundings?

A

entropy decreases

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7
Q

entropy value in a feasible reaction?

A

positive

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8
Q

what is required for a reaction to be feasible? (even under non-standard conditions)

A

the change in free energy must be negative

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9
Q

how do you predict reaction feasibility?

A

G<0 reaction is feasible
G=0 reaction is just feasible (equilibrium)
G>0 reaction is not feasible

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10
Q

what happens to a reversible reaction in terms of free energy?

A

it will proceed spontaneously until G=0

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