Endothermic and Exothermic Assessment

What is a common characteristic of exothermic reactions?

• Exothermic reactions often produce light or sound, in addition to heat.

• Exothermic reactions absorb heat from their surroundings.

• Exothermic reactions only produce gas as a product.

• Exothermic reactions require a catalyst to occur.

Give an example of an endothermic process.

• Baking bread

• Freezing water

• Condensing steam

• Burning wood

How can you identify an exothermic reaction in a lab?

• By observing a color change in the reaction mixture.

• By feeling a temperature increase in the reaction mixture.

• By measuring the pH level of the reaction mixture.

• By noting the formation of gas bubbles in the reaction mixture.

What is an endothermic reaction?

• A chemical reaction that releases heat into its surroundings.

• A chemical reaction that absorbs heat from its surroundings, resulting in a decrease in temperature.

• A reaction that occurs spontaneously without any energy input.

• A reaction that only occurs at high temperatures.

In a chemical reaction, where is heat in an endothermic reaction found?

• In an endothermic reaction, heat is a reactant.

• Heat is released as a product.

• Heat is not involved in the reaction.

• Heat is a byproduct of the reaction.

What is the role of activation energy in chemical reactions?

• Activation energy is the minimum energy required for a chemical reaction to occur.

• Activation energy is the energy released during a chemical reaction.

• Activation energy is the energy needed to break chemical bonds.

• Activation energy is the energy that increases the temperature of the reactants.

How can you identify an endothermic reaction in a lab?

• By observing a color change in the reaction mixture.

• By feeling a temperature decrease in the reaction mixture.

• By measuring an increase in pressure during the reaction.

• By noting the formation of a gas in the reaction.

What happens to temperature during an exothermic reaction?

• The temperature decreases during an exothermic reaction.

• The temperature remains constant during an exothermic reaction.

• The temperature increases during an exothermic reaction.

• The temperature fluctuates during an exothermic reaction.

In a chemical reaction, where is heat in an exothermic reaction found?

• As a reactant

• As a product

• In the surrounding environment

• In the chemical bonds

What happens to temperature during an endothermic reaction?

• The temperature increases during an endothermic reaction.

• The temperature remains constant during an endothermic reaction.

• The temperature decreases during an endothermic reaction.

• The temperature fluctuates during an endothermic reaction.