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Energy changes in a reaction - MYP Questionbank | RevisionDojo

Practice Energy changes in a reaction with authentic MYP MYP Chemistry exam questions for both SL and HL students. This question bank mirrors Paper 1, 2, 3 structure, covering key topics like atomic structure, chemical reactions, and organic chemistry. Get instant solutions, detailed explanations, and build exam confidence with questions in the style of MYP examiners.

Type

Difficulty

Question 1

Which statement correctly describes the relationship between the energy required to break one mole of $\text{H}-\text{H}$ bonds and the energy released when one mole of $\text{H}-\text{H}$ bonds is formed?

Question 2

Why is a polystyrene cup a preferred container over a metal beaker for measuring the temperature change of an aqueous reaction in a school laboratory?

Question 3

In an endothermic reaction, which statement best describes the bond strengths?

Question 4

True or False: Adding a catalyst to a reaction will change the value of $\Delta H$ (the enthalpy change) for that reaction.

Question 5

Two separate experiments are performed. Experiment A: $1.0 \text{ g}$ of a metal reacts in $50 \text{ g}$ of water. Experiment B: $1.0 \text{ g}$ of the same metal reacts in $100 \text{ g}$ of water. If both reactions go to completion, how will the temperature changes ( $\Delta T$ ) compare?

Question 6

In an endothermic reaction, why does the temperature of the reaction mixture usually decrease?

Question 7

Which statement best describes the 'alternative reaction pathway' provided by a catalyst?

Question 8

A forward reaction $\text{A} + \text{B} \rightarrow \text{C} + \text{D}$ is exothermic. Which of the following statements about the reverse reaction $\text{C} + \text{D} \rightarrow \text{A} + \text{B}$ is correct?

Question 9

How does increasing the temperature of a reaction mixture affect the particles?

Question 10

Using the bond energy values from the text, where $\text{H-H}$ is $436 \text{ kJ mol}^{-1}$ and $\text{O-H}$ is $463 \text{ kJ mol}^{-1}$ , which bond requires more energy to break?

Type

Difficulty

Question 1

Question 2

Why is a polystyrene cup a preferred container over a metal beaker for measuring the temperature change of an aqueous reaction in a school laboratory?

Question 3

In an endothermic reaction, which statement best describes the bond strengths?

Question 4

True or False: Adding a catalyst to a reaction will change the value of $\Delta H$ (the enthalpy change) for that reaction.

Question 5

Question 6

In an endothermic reaction, why does the temperature of the reaction mixture usually decrease?

Question 7

Which statement best describes the 'alternative reaction pathway' provided by a catalyst?

Question 8

Question 9

How does increasing the temperature of a reaction mixture affect the particles?

Question 10

Using the bond energy values from the text, where $\text{H-H}$ is $436 \text{ kJ mol}^{-1}$ and $\text{O-H}$ is $463 \text{ kJ mol}^{-1}$ , which bond requires more energy to break?

Type

Difficulty

Question 1

Question 2

Why is a polystyrene cup a preferred container over a metal beaker for measuring the temperature change of an aqueous reaction in a school laboratory?

Question 3

In an endothermic reaction, which statement best describes the bond strengths?

Question 4

True or False: Adding a catalyst to a reaction will change the value of $\Delta H$ (the enthalpy change) for that reaction.

Question 5

Question 6

In an endothermic reaction, why does the temperature of the reaction mixture usually decrease?

Question 7

Which statement best describes the 'alternative reaction pathway' provided by a catalyst?

Question 8

Question 9

How does increasing the temperature of a reaction mixture affect the particles?

Question 10

Using the bond energy values from the text, where $\text{H-H}$ is $436 \text{ kJ mol}^{-1}$ and $\text{O-H}$ is $463 \text{ kJ mol}^{-1}$ , which bond requires more energy to break?

Energy changes in a reaction Questionbank