6.1 Endothermic and Exothermic Processes

• Endothermic processes absorb heat from the surroundings.


  True
• In an exothermic process, the energy change is negative.


  True
• In photosynthesis, plants absorb heat and light to convert CO2 and H2O into glucose and oxygen
• Combustion reactions release heat and increase the temperature of the surroundings
• An exothermic process releases heat and gives off energy
• An exothermic process releases heat, while an endothermic process absorbs heat.


  True
• What is an exothermic process?

  Releases heat to surroundings
• Dissolving certain salts in water is an example of an endothermic process.


  True
• Why is photosynthesis considered an endothermic process?

  It absorbs heat and light
• What is condensation, and why is it exothermic?

  Water vapor releases heat
• In exothermic processes, the system releases heat, resulting in a decrease in internal energy.
• Match the process with its enthalpy change:

  Endothermic ↔️ Positive ΔH

  Exothermic ↔️ Negative ΔH
• What type of energy change occurs in an exothermic process?

  Negative
• Melting ice is an example of an endothermic process.


  True
• Neutralization reactions release heat
• Enthalpy measures the total heat content of a system at constant pressure
• In an endothermic process, the energy change is positive
• Endothermic processes have a positive change in enthalpy
• What is an endothermic process?

  Absorbs heat from surroundings
• An exothermic process is a process that releases heat
• Order the steps involved in an endothermic process:

  1️⃣ Heat is absorbed from surroundings

  2️⃣ System gains energy

  3️⃣ Surrounding temperature decreases
• Order the steps involved in an exothermic process:

  1️⃣ System releases heat

  2️⃣ Surrounding temperature increases

  3️⃣ System loses energy
• What is an example of an exothermic process?

  Condensation
• Why is melting ice considered an endothermic process?

  It absorbs heat
• What is an endothermic process?

  Absorbs heat from surroundings
• What is the energy change in an endothermic process?

  Positive
• What is an example of an exothermic process?

  Combustion reactions
• Exothermic processes result in a decrease in the system's internal energy
• What happens to internal energy during an endothermic process?

  Increases
• A positive enthalpy change (ΔH > 0) indicates an exothermic process.

  False
• In an exothermic process, heat flows from the system to the surroundings
• Why is dissolving certain salts in water considered an endothermic process?

  Heat is absorbed
• Freezing water is an exothermic process.


  True
• Exothermic processes result in a negative energy change (ΔE < 0).


  True
• An exothermic process releases heat to the surroundings.

  True
• Match the property with the correct process:

  Heat flow: Absorbs heat ↔️ Endothermic

  Heat flow: Releases heat ↔️ Exothermic
• An exothermic process releases heat to the surroundings
• What is an example of an endothermic process?

  Melting ice
• Combustion reactions are examples of exothermic processes.


  True
• In endothermic processes, the change in energy (ΔE) is positive.


  True