Practise MYP Chemistry questions on 5.17 Energy Changes in a Reaction and review the explanations to check your understanding.
Use these questions for topic practice and to find ideas you want to revisit in your notes or lessons.
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?
True or False: Adding a catalyst to a reaction will change the value of (the enthalpy change) for that reaction.
Why does a highly exothermic reaction, such as the combustion of methane, usually require a spark to begin?
What happens to the chemical potential energy of the system during an exothermic reaction?
In a specific chemical reaction, the energy required to break the reactant bonds is and the energy released when new bonds form is . What is the overall enthalpy change () for this reaction?
Polystyrene reacts with the solution to provide more heat
Metal beakers have a specific heat capacity of zero
Polystyrene prevents the activation energy from changing
Polystyrene is a good insulator, minimizing heat loss to the surroundings
True
False
To increase the mass of the oxygen particles
To provide the initial activation energy to break reactant bonds
To ensure the products have more energy than the reactants
To make the reaction endothermic
It increases as energy is absorbed from the surroundings
It increases to overcome the activation energy barrier
It decreases as energy is released to the surroundings
It remains constant while kinetic energy increases
