entropy Flashcards

1
Q

second law of thermodynamics

A

spontaneous processes increase the entropy of the universe

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2
Q

how to calculate deltaS

A

sum of product S - sum of reactant S

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3
Q

how to calculate deltaG

A

deltaG (kJ mol-1) = deltaH (kJ mol-1) - (temp(K) x deltaS(convert to kJ mol-1, usually given in J mol-1)

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4
Q

how to calculate T min (minimum temperature a reaction can happen)

A

deltaH / deltaS

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5
Q

why might a feasible reaction not be spontaneous?

A

-temp may be too low to reach activation energy
-particles may not collide (which they must to do react)

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6
Q

how can you tell if a reaction is feasible?

A

deltaG must be negative

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