IGCSE 11.1.5

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IGCSE 11.1.5

  1. 1. Endothermic reactionsEndothermic reactions absorb thermal energy, and socause a decrease in temperature.What are some examples? 1 of 35 © Boardworks Ltd 2007
  2. 2. Endothermic reactionsEndothermic reactions absorb thermal energy, and socause a decrease in temperature.What are some examples? thermal decomposition, e.g. calcium carbonate in a blast furnace 2 of 35 © Boardworks Ltd 2007
  3. 3. Endothermic reactionsEndothermic reactions absorb thermal energy, and socause a decrease in temperature.What are some examples? thermal decomposition, e.g. calcium carbonate in a blast furnace photosynthesis 3 of 35 © Boardworks Ltd 2007
  4. 4. Endothermic reactionsEndothermic reactions absorb thermal energy, and socause a decrease in temperature.What are some examples? thermal decomposition, e.g. calcium carbonate in a blast furnace photosynthesis some types of electrolysis 4 of 35 © Boardworks Ltd 2007
  5. 5. Endothermic reactionsEndothermic reactions absorb thermal energy, and socause a decrease in temperature.What are some examples? thermal decomposition, e.g. calcium carbonate in a blast furnace photosynthesis some types of electrolysis sherbet! 5 of 35 © Boardworks Ltd 2007
  6. 6. Endothermic reaction: energy transferWhat happens to energy in the reaction betweenammonium nitrate and water? 6 of 35 © Boardworks Ltd 2007
  7. 7. Endothermic reaction: energy transferWhat happens to energy in the reaction betweenammonium nitrate and water?  During the reaction, thermal energy from the reaction mixture is converted to chemical energy in the products. 7 of 35 © Boardworks Ltd 2007
  8. 8. Endothermic reaction: energy transferWhat happens to energy in the reaction betweenammonium nitrate and water?  During the reaction, thermal energy from the reaction mixture is converted to chemical energy in the products.  This causes the temperature of the reaction mixture to fall. 8 of 35 © Boardworks Ltd 2007
  9. 9. Endothermic reaction: energy transferWhat happens to energy in the reaction betweenammonium nitrate and water?  During the reaction, thermal energy from the reaction mixture is converted to chemical energy in the products.  This causes the temperature of the reaction mixture to fall.  Thermal energy from the surroundings is transferred to the reaction mixture, and the temperature eventually returns to normal. 9 of 35 © Boardworks Ltd 2007

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