EXOTHERMIC & ENDOTHERMIC REACTION 5.5.1.1.

Which is more useful in describing the energy changes during a reaction: energy level diagram or reaction profile?

• Neither is useful
• Both are equally useful
• Reaction profile
• Energy level diagram

What happens to the temperature of the surroundings in an endothermic reaction?

• It fluctuates
• It increases
• It decreases
• It stays the same

What is activation energy?

• The minimum energy needed for particles to react
• The maximum energy that can be reached during a reaction
• The energy absorbed during a reaction
• The energy released during a reaction

What happens to the temperature of the surroundings in an exothermic reaction?

• It stays the same
• It increases
• It decreases
• It fluctuates

Which of the following is an everyday use of an endothermic reaction?

• Cooking food on a stove
• Burning fuel in a car engine
• Using a hairdryer
• Using an instant ice pack

Which type of reaction transfers energy to the surroundings?

• Exothermic reaction
• Endothermic reaction
• Both exothermic and endothermic reactions
• Neither exothermic nor endothermic reactions

What type of reaction is shown in the reaction profile?

• No reaction is shown
• Endothermic reaction
• Both exothermic and endothermic reactions
• Exothermic reaction

Which type of reaction is an example of an exothermic reaction?

• Thermal decomposition reaction
• Neutralisation reaction
• Reaction of citric acid and sodium hydrogencarbonate
• Combustion reaction

What does an energy level diagram show?

• The reactants and products of a reaction
• The difference in energy between reactants and products
• Whether a reaction is exothermic or endothermic
• All of the above

In which type of reaction does the energy level decrease?

• Both exothermic and endothermic reactions
• Neither exothermic nor endothermic reactions
• Endothermic reaction
• Exothermic reaction