ENERGETIC, II.

Question 1

DELTA G,NEGATIVE.

Answer 1

IN ORDER FOR A REACTION TO BE FEASIBLE, THE GIBBS FREE ENERGY, DELTA G, MUST IN FACT BE NEGATIVE.

Question 2

C-C BOND STRENGTH, COMPARED TO C=C BOND STRENGTH.

Answer 2

C-C BONDS CONTAINS ONE,1, SIGMA BOND.
C=C BOND, CONTAINS ONE,1, PI BOND AND ONE,1, SIGMA BOND.

SO A C=C BOND, IS WEAKER THAN TWO,2, C-C BONDS.
AS IT CONSISTS OF A PI AND A SIGMA BONDS, RATHER THAN TWO,2, SIGMA BONDS.

Question 3

COMBUSTION, TYPE OF REACTION.

Answer 3

AN EXOTHERMIC REACTION, BONDS FORMED.
SO A NEGATIVE VALUE FOR THE ENTHALPY CHANGE OF COMBUSTION,
-KJmol^-1.

Question 4

REASONS WHY A REACTION IS FEASIBLE, IN TERMS OF ENTROPY.

Answer 4

THE ENTROPY CHANGE OF THE SYSTEM IS ALWAYS POSITIVE.
BECAUSE THE ENTROPY OF THE SURROUNDINGS AND THE SYSTEM ARE BOTH ALWAYS POSITIVE.

Question 5

ENTROPY CHANGE OF A SYSTEM, POSITIVE.
THE REASONS FOR THIS.

Answer 5

BECAUSE THERE IS AN INCREASED NUMBER OF MOLES.

A CHANGE OF STATE AS GAS, LIQIUD, SOLUTION, ARE PRODUCED FROM SOLID.