5.1.3 Examples of endothermic reactions: thermal decomposi

• What is thermal decomposition?

  Breakdown of a compound when heated
• What is thermal decomposition?

  Breakdown of a compound into simpler substances
• What are the heat energy changes in thermal decomposition and exothermic reactions?

  • Thermal Decomposition: Absorbs heat
  • Exothermic: Releases heat
• What is the reaction for the thermal decomposition of Calcium Carbonate?

  CaCO₃ → CaO + CO₂
• How does thermal decomposition differ from other chemical reactions?

  It specifically involves breakdown when heated
• What is a thermal decomposition reaction?

  A reaction where a compound breaks down due to heat
• What is required for thermal decomposition to occur?

  Absorption of heat energy
• What are the outputs of photosynthesis?

  • Oxygen (O2)
  • Sugar (glucose)
• What are the inputs and outputs of photosynthesis?

  Inputs:

  • Carbon Dioxide (CO₂)
  • Water (H₂O)
  • Light Energy

  
  

  Outputs:

  • Glucose (C₆H₁₂O₆)
  • Oxygen (O₂)
• What are the products of the thermal decomposition of Copper Carbonate?

  Copper Oxide and Carbon Dioxide
• Where do the light-dependent reactions occur?

  In the thylakoid membranes
• What are the main steps of the Calvin cycle?

  • CO2 fixation
  • Reduction of fixed carbon
  • Regeneration of RuBP
  • Synthesis of glucose and other carbohydrates
• What is the role of chlorophyll in photosynthesis?

  Chlorophyll absorbs light energy to power the photosynthesis process.
• What is the name of the process shown in the left side of the image?

  Light-dependent reactions
• Why is photosynthesis considered an endothermic reaction?

  It absorbs light energy
• What do plants use to produce glucose and oxygen during photosynthesis?

  Carbon dioxide and water
• What is photosynthesis?

  Process of converting light energy into chemical energy
• What is the main purpose of photosynthesis?

  To produce sugar (glucose) for the plant
• What are the two main stages of photosynthesis?

  Light-dependent reactions and Calvin cycle
• What is the reaction for the thermal decomposition of Copper Carbonate?

  CuCO₃ → CuO + CO₂
• How does thermal decomposition differ from exothermic reactions?

  Thermal decomposition absorbs heat, exothermic releases
• How do plants utilize light energy in photosynthesis?

  • Absorb light energy
  • Drive endothermic reactions
  • Convert simple molecules into complex sugars
• If a plant is placed in complete darkness, how would this affect its photosynthesis process?

  Without light energy, the plant would not be able to produce glucose through photosynthesis
• What is the product of photosynthesis along with glucose?

  Oxygen
• What do plants convert light energy into during photosynthesis?

  Chemical energy stored in glucose
• Is heat needed for thermal decomposition reactions?

  Yes, heat is required for these reactions
• What are the inputs of photosynthesis?

  • Carbon dioxide (CO2)
  • Water (H2O)
  • Light energy
• How does thermal decomposition occur?


  By absorbing heat energy
• What are the main steps of the light-dependent reactions?

  • Light absorption by chlorophyll
  • Water splitting (photolysis)
  • Electron transport chain
  • ATP and NADPH production
• What type of process is photosynthesis?

  Endothermic process
• What type of energy do plants absorb during photosynthesis?

  Light energy
• What is the chemical formula for oxygen produced in photosynthesis?

  O₂
• Write the chemical equation for photosynthesis.

  $6CO_{2} +$$6H_{2}O +$$\text{light energy} \rightarrow C_{6}H_{12}O_{6} +$$6O_{2}$
• How do light-dependent reactions contribute to the Calvin cycle?

  They provide ATP and NADPH for glucose synthesis
• What is the chemical formula for glucose produced in photosynthesis?

  C₆H₁₂O₆
• How do the roots of the plant contribute to photosynthesis?

  The roots absorb water (H2O) and minerals from the soil, which are used as inputs for photosynthesis.
• What happens to energy during the photosynthesis process?

  Energy is absorbed to break bonds
• How do the light-dependent reactions and the Calvin cycle work together to complete the overall process of photosynthesis?

  The light-dependent reactions provide the ATP and NADPH needed to power the Calvin cycle, which fixes CO2 and produces glucose
• What is the name of the process shown in the right side of the image?

  The Calvin cycle
• What are the reactants in the photosynthesis chemical equation?

  Carbon dioxide and water