Exothermic and Endothermic Reactions

What type of reaction releases energy into the surroundings?

• Endothermic reaction

• Activation reaction

• Neutral reaction

• Exothermic reaction

What does a reaction profile illustrate?

• The temperature change during a reaction

• The concentration of reactants over time

• The change in energy during a reaction

• The speed of a reaction

What is the significance of the energy difference between reactants and products in a reaction?

• It shows whether the reaction is exothermic or endothermic

• It determines the speed of the reaction

• It indicates the activation energy required

• It measures the concentration of the reactants

What is the common form of energy exchange in exothermic reactions?

• Light energy

• Electrical energy

• Heat energy

• Mechanical energy

Which of the following is an example of an exothermic reaction?

• Melting of ice

• Photosynthesis

• Evaporation of water

• Combustion of fuel

Which reaction requires energy input from the surroundings to proceed?

• Exothermic reaction

• Endothermic reaction

• Neutralization reaction

• Combustion reaction

In which type of reaction do the products have more energy than the reactants?

• Exothermic reaction

• Endothermic reaction

• Oxidation reaction

• Neutralization reaction

Which reaction involves the breaking down of calcium carbonate?

• Neutralization

• Exothermic reaction

• Combustion

• Endothermic decomposition

What represents the minimum amount of energy required for reactants to transform into products?

• Chemical energy

• Kinetic energy

• Activation energy

• Potential energy

How can activation energy be represented on a reaction profile?

• As the difference in energy from reactants to the highest point on the curve

• As the highest point on the curve

• As the difference in height between reactants and products

• As the total energy of the products