Exothermic and Endothermic Reactions(practice)

What type of reactions usually feel hot?

• Endothermic reactions

• Exothermic reactions

• Isothermal reactions

• Catalytic reactions

What type of change occurs when two substances are mixed together and a new substance forms?

• Physical Change

• Chemical Change

• Biological Change

• Mechanical Change

What happens to the surrounding temperature during an Endothermic reaction?

• The surrounding temperature gets hot.

• The surrounding temperature remains the same.

• The surrounding temperature gets cold.

• The surrounding temperature fluctuates.

What is an Exothermic reaction?

• A chemical reaction that absorbs energy in the form of heat.

• A chemical reaction that releases energy in the form of heat.

• A reaction that occurs only in the presence of a catalyst.

• A reaction that produces light without heat.

Which of the following is an example of an Exothermic Reaction?

• Cooking an egg

• Plants making sugar through photosynthesis

• Burning a match

• Dynamite exploding

Give an example of an Endothermic reaction.

• Combustion of gasoline

• Photosynthesis

• Respiration

• Decomposition of hydrogen peroxide

What is combustion? Is it an Exothermic or Endothermic reaction?

• Combustion is an Endothermic reaction that absorbs heat.

• Combustion is an Exothermic reaction that releases heat and light.

• Combustion is a reaction that does not involve heat.

• Combustion is a reaction that only occurs in the presence of water.

What is a common characteristic of Endothermic reactions?

• They release heat to the surroundings.

• They often result in a decrease in temperature of the surroundings.

• They occur spontaneously without energy input.

• They increase the temperature of the surroundings.

What happens to the energy in a chemical bond during an Exothermic reaction?

• Energy is absorbed when chemical bonds are formed in an Exothermic reaction.

• Energy is released when chemical bonds are formed in an Exothermic reaction.

• Energy remains constant during an Exothermic reaction.

• Energy is converted into mass during an Exothermic reaction.

What is the main difference between Exothermic and Endothermic reactions?

• Exothermic reactions absorb heat, while Endothermic reactions release heat.

• Exothermic reactions release heat, while Endothermic reactions absorb heat.

• Both Exothermic and Endothermic reactions release heat.

• Exothermic reactions occur only in gases, while Endothermic reactions occur in liquids.