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CAIE A-Level Chemistry AS 5.2.1 Hesss Law to Construct Simple Energy Cycles Questions

Practise constructing and interpreting simple Hess’s law energy cycles to calculate enthalpy changes using CAIE 9701 AS questions and mark schemes.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • Use Hess’s law to construct and interpret simple energy cycles for calculating enthalpy changes.

CAIE A-Level Chemistry AS 5.2.1 Hesss Law to Construct Simple Energy Cycles Questions question 1

[Maximum number: 1]

An energy cycle is shown.

Figure for Question CAIE A-Level Chemistry AS 5.2.1 Hesss Law to Construct Simple Energy Cycles Questions question 1 — CAIE A-Level Chemistry AS

The energy changes involved are X, Y and Z .
The numerical value of energy change Y is either -890 or +890 .
The numerical value of energy change Z is either -964 or +964 .
Which of the three values are negative?

A

X and Z

B

X only

C

Y and Z

D

Y only

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