IB Chemistry Topic R1.2 Energy Cycles in Reactions Questionbank (SL/HL)

IB Chemistry Topic R1.2 Energy Cycles in Reactions Questionbank (SL/HL) | RevisionDojo

Practice IB Chemistry Topic R1.2 Energy Cycles in Reactions with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for R1.2 Energy Cycles in Reactions and mirrors Paper 1A, 1B, 2 style where relevant.

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Paper

Level

Question 1

HLPaper 1A

Which of the following best describes the enthalpy change when 1 mol of substance is completely burned in oxygen under standard conditions?

Question 2

HLPaper 1A

The standard enthalpy of formation of ethanol is $- 277 kJ mol^{- 1}$ . What does this value represent?

Question 3

SL & HLPaper 1A

Which of the following statements regarding energy cycles in reactions is correct?

Question 4

HLPaper 2

Born–Haber cycles are used to calculate lattice enthalpy of $N a C l$ . Given:

$Δ H_{f}^{\circ} = - 411 kJ mo l^{- 1}$
Sublimation of Na: $+ 108$
Ionization energy Na: $+ 496$
Bond enthalpy $C l_{2}$ : $+ 243$
Electron affinity Cl: $- 349$

State what is meant by the lattice enthalpy (of formation).

[1]

Describe the steps of a Born–Haber cycle for $N a C l$ .

[2]

Calculate the lattice enthalpy.

[3]

Question 5

SL & HLPaper 1A

What is Hess's Law?

IB Chemistry R1.2 Energy Cycles in Reactions Questionbank

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