Test 3: Free Energy

Question 1

Gibbs free energy

Answer 1

the total energy released or absorbed in a physical or chemical process.

Question 2

Gibbs free energy is represented by

Answer 2

^G (triangle symbol)

Question 3

Where ^G is negative, the overall process is __(2)

Answer 3

exergonic and spontaneous

Question 4

Where ^G is positive, the overall process is__(2)

Answer 4

endergonic and nonspantanious

Question 5

A spontaneous reaction is one that

Answer 5

continues to occur without any assistance once it has begun.

Question 6

Any process which requires a constant addition of energy to maintain it is a __process.

Answer 6

nonspontaneous

Question 7

The relationship (factor/equation) between enthalpy, entropy, and free energy

Answer 7

^G = ^H - T^S / gibbs free energy= enthalpy - temperature(kelvins)*entropy

Question 8

at high temperatures we expect ^G to be __, and at low temperatures it should be __.

Answer 8

positive; negative

Question 9

at high temperatures the __value is more important and at low temperatures the __ value is more important.

Answer 9

entropic; enthalpy

Question 10

Energy of Activation

Answer 10

high energy transition state which must be reached for a spontaneous reaction to occur

Question 11

The smaller the activation energy the

Answer 11

faster the reaction takes place

Question 12

Before reactants can become products (or spontaneous reactions can occur) they must have enough energy to get over the

Answer 12

activation energy or energy of activation

Question 13

What is the difference between exothermic and exergonic?

Answer 13

Exothermic is the release of heat energy (^H), exergonic is the Gibbs total energy released (^G).