Understanding Endothermic and Exothermic Processes

What is defined as the part of the universe that we focus our attention on in a scientific study?

• The atmosphere

• The surroundings

• The system

• The environment

In a chemical reaction, what does a negative Delta H signify?

• The reaction is endothermic

• The reaction absorbs energy

• The reaction is at equilibrium

• The reaction releases energy

Which of the following is an example of an endothermic process?

• Freezing

• Deposition

• Condensation

• Melting

What happens to the potential energy of reactants in an endothermic reaction?

• It increases

• It fluctuates

• It remains the same

• It decreases

Which process is characterized by the release of thermal energy into the surroundings?

• Evaporation

• Sublimation

• Melting

• Condensation

In an exothermic reaction, what happens to the potential energy of the products compared to the reactants?

• It is the same

• It is lower

• It is higher

• It is unpredictable

What is the process called when water vapor turns into liquid water?

• Condensation

• Evaporation

• Sublimation

• Melting

During which process do molecules absorb thermal energy to transition from solid to liquid?

• Deposition

• Freezing

• Condensation

• Melting

What happens to the kinetic energy of molecules as they absorb heat?

• It decreases

• It increases

• It remains constant

• It becomes zero

Which of the following processes is endothermic?

• Freezing

• Deposition

• Condensation

• Sublimation