Importance of Free Energy in Biological Processes

Question 1

Favourable Reactions Def

Answer 1

Reactions occur to decrease the enrgy of the system. This is done in exothermic reactions moving towards disorder

Question 2

Entropy Def

Answer 2

Measure of randomness (disorder). High entropy = low energy system. Temperature dependent (high temp = high entropy). Units K/J mol

Question 3

Positive Delta S

Answer 3

Going from order to disorder

Question 4

Negative Delta S

Answer 4

going from disorder to order

Question 5

possitive delta H

Answer 5

endothermic

Question 6

negative delta H

Answer 6

exothermic

Question 7

Indicators of postive S

Answer 7

State change from solid->liquid-> gas, increasing temp and dissolution, increasing number of molecules

Question 8

Indicators of negative delta S

Answer 8

State change gas->liquid-> solid, decreasing temp, precipitation, decreasing number of molecules

Question 9

Gibbs Free Energy

Answer 9

Energy associated with a chemical reaction that is used to do work

Question 10

Delta G

Answer 10

the amount of energy for a reaction at a constant temp

Question 11

Negative delta G

Answer 11

Spontaneous Reaction

Question 12

Positive delta G

Answer 12

Non-spontaneous reaction

Question 13

Delta G Equation

Answer 13

Delta H - (Temp in K)(Delta S)

Question 14

When delta S is negative (moves to order) how should the temp be to esure - delta G

Answer 14

Low. Negative delta S times a negative temp (equation) makes a positive.

Question 15

What does temp need to be when reaction is endothermic and delta S is negative

Answer 15

high. Ensures negative delta G