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Edexcel IAL Chemistry 16.11 Ecell, entropy and equilibrium constant

Use the sign and proportional relationships carefully: positive E°cell links to positive ΔS total and lnK, but E°cell is not directly proportional to K itself.

Syllabus
First assessment 2019
Course
Chemistry YCH11
Level
A2

Exam points

  • Link positive E°cell with positive total entropy change and positive lnK.
  • Use given relationships and constants to calculate ΔS total or an equilibrium constant.
  • Choose the correct proportional graph between E°cell and total entropy change.

16.11—Eocell is directly proportional to the total entropy change and to lnK for a reaction question 1

[Maximum number: 1]

Which graph shows the relationship between Ecell plotted on the x-axis and ΔStotal on the y-axis for any electrochemical system?

Figure for Question 16.11—Eocell is directly proportional to the total entropy change and to lnK for a reaction question 1 — Edexcel A-Level Chemistry A2
Figure for Question 16.11—Eocell is directly proportional to the total entropy change and to lnK for a reaction question 1 — Edexcel A-Level Chemistry A2
Figure for Question 16.11—Eocell is directly proportional to the total entropy change and to lnK for a reaction question 1 — Edexcel A-Level Chemistry A2
Figure for Question 16.11—Eocell is directly proportional to the total entropy change and to lnK for a reaction question 1 — Edexcel A-Level Chemistry A2
A

graph A

B

graph B

C

graph C

D

graph D

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