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  • 1. Exothermic and endothermic reactions
  • 2. Exothermic and endothermic reactionsAll reactions are exothermic (give out heat) in one directionand endothermic (take in heat) in the other.
  • 3. Exothermic and endothermic reactionsAll reactions are exothermic (give out heat) in one directionand endothermic (take in heat) in the other. If the temperature is increased:  equilibrium shifts to decrease the temperature  equilibrium shifts in the endothermic direction
  • 4. Exothermic and endothermic reactionsAll reactions are exothermic (give out heat) in one directionand endothermic (take in heat) in the other. If the temperature is increased:  equilibrium shifts to decrease the temperature  equilibrium shifts in the endothermic direction If the temperature is decreased:  equilibrium shifts to increase the temperature  equilibrium shifts in the exothermic direction
  • 5. Opposing changes in temperature
  • 6. Opposing changes in temperatureNitrogen dioxide is in constant equilibrium with dinitrogentetroxide. The forward reaction is exothermic and thebackwards reaction is endothermic.
  • 7. Opposing changes in temperatureNitrogen dioxide is in constant equilibrium with dinitrogentetroxide. The forward reaction is exothermic and thebackwards reaction is endothermic. nitrogen dioxide dinitrogen tetroxide 2NO2 (g) N2O4 (g)
  • 8. Opposing changes in temperatureNitrogen dioxide is in constant equilibrium with dinitrogentetroxide. The forward reaction is exothermic and thebackwards reaction is endothermic. nitrogen dioxide dinitrogen tetroxide 2NO2 (g) N2O4 (g)What will happen if the temperature is increased?
  • 9. Opposing changes in temperatureNitrogen dioxide is in constant equilibrium with dinitrogentetroxide. The forward reaction is exothermic and thebackwards reaction is endothermic. nitrogen dioxide dinitrogen tetroxide 2NO2 (g) N2O4 (g)What will happen if the temperature is increased? The equilibrium will shift to decrease the temperature, i.e. to the left (endothermic). More NO2 will be produced.
  • 10. Opposing changes in temperatureNitrogen dioxide is in constant equilibrium with dinitrogentetroxide. The forward reaction is exothermic and thebackwards reaction is endothermic. nitrogen dioxide dinitrogen tetroxide 2NO2 (g) N2O4 (g)What will happen if the temperature is increased? The equilibrium will shift to decrease the temperature, i.e. to the left (endothermic). More NO2 will be produced.If the temperature is decreased, more N2O4 will be produced.