2.2 Reaction feasibility

Question 2

Standard enthalpy of formation

Answer 2

The enthalpy change when one mole of a substance is formed from its elements in their standard states

Question 3

The enthalpy change when one mole of a substance is formed from its elements in their standard states

Answer 3

Standard enthalpy of formation

Question 4

when is a substance in its standard stare

Answer 4

Pressure of 1 atmosphere

And at a specific temperature, usually 298 K

Question 5

What can standard enthalpy of a reaction be calculated from

Answer 5

Question 6

Entropy of a system

Answer 6

A measure of the degree of disorder of the system

Question 7

A measure of the degree of disorder of the system

Answer 7

Entropy of a system

Question 8

Entropy symbol

Answer 8

S

Question 9

The greater the degree of disorder, the _____ the entropy

Answer 9

Greater

Question 10

The _________ the degree of disorder, the greater the entropy

Answer 10

Greater

Question 11

The greater the _____________, the greater the entropy

Answer 11

degree of disorder

Question 12

The greater the degree of disorder, the greater the ______

Answer 12

Entropy

Question 13

Solids have ____ disorder

Answer 13

Low

Question 14

______ have low disorder

Answer 14

Solids

Question 15

Gases have _____ disorder

Answer 15

High

Question 16

Entropy when temperature increases

Answer 16

Increases

Question 17

Entropy at the MP of a substance

Answer 17

Rapid increase in entropy

Question 18

When is there a rapid increase in entropy of a substance

Answer 18

At the MP

Question 19

Entropy at boiling point

Answer 19

More rapid and larger change in entropy

Question 20

When is there a more rapid and larger change in entropy

Answer 20

Entropy at boiling point

Question 21

Second law of thermodynamics

Answer 21

The total entropy of a reaction system and its surroundings increases the entropy of the surroundings

Question 22

The total entropy of a reaction system and its surroundings increases the entropy of the surroundings

Answer 22

Second law of thermodynamics

Question 23

Heat energy released by the reaction system affect on surroundings

Answer 23

Increases the entropy of the surroundings

Question 24

What increases the entropy of the surroundings

Answer 24

Heat energy released by the reaction system

Question 25

What decreases the entropy of the surroundings

Answer 25

Heat energy absorbed by the reaction

Question 26

Heat energy absorbed by the reaction system affect on surroundings

Answer 26

Decreases the entropy

Question 27

Third law of thermodynamics

Answer 27

Entropy of a perfect crystal at 0 K is zero

Question 28

Entropy of a perfect crystal at 0 K is zero

Answer 28

Third law of thermodynamics

Question 29

Free energy

Answer 29

G

Question 30

Change in free energy between reactants and products is negative, what is said about the reaction

Answer 30

Reaction may occur. The reaction is feasible

Question 31

Enthalpy of a feasible reaction

Answer 31

Change in free energy between reactants and products is negative

Question 32

Feasible reaction

Answer 32

A reaction that tends towards the products rather than the reactants

Question 33

A reaction that tends towards the products rather than the reactants

Answer 33

Feasible reaction

Question 34

Rate of reaction of feasible reaction

Answer 34

No indication

Question 35

If G > 0, reaction may be _______

Answer 35

Feasible

Question 36

Delta G at equilibrium

Answer 36

0

Question 37

When will a reversible reaction proceed to

Answer 37

Will proceed spontaneously until the composition is reached where delta G = 0

Question 38

Feasibility of reactions under non standard conditions

Answer 38

Any reaction is feasible if delta G is negative