2/16 notes

Question 1

what is entropy change of the universe the sum of

Answer 1

the entropy changes of system and surroundings

Question 2

2nd law of thermodyamic is

Answer 2

delta S is greater than zero, so spontenaous process

Question 3

what is Gibbs free energy (delta G)

Answer 3

a new thermodyanmic quantity in terms of H and S that is directly useful of criterion of spontaneity

Question 4

what is Gibbs free energy often also called

Answer 4

chemical potential

Question 5

if delta G rxn is less than zero is it spontaneous of non spontaneous

Answer 5

spontaneous

Question 6

how to calculate enthalpy

Answer 6

delta H=J/mol

Question 7

if delta H is positive and delta S is negative what is delta G

Answer 7

+ and nonspontaneous

Question 8

if delta H is - and delta S is + what is delta G

Answer 8

• and spontaneous

Question 9

if delta H is positive and delta S is postive what is delta G

Answer 9

temperature dependent

Question 10

if delta H is - and delta S is - what is delta G

Answer 10

temperature dependent

Question 11

third law of thermodynamics

Answer 11

the entropy of a system approaches a constant value as the temperature approaches aolsute zero

Question 12

what is second law of thermodynamics

Answer 12

when energy changes from one form to another form, or matter moves freely, entropy (disorder) in a closed system increases