Today in Class we lernt about Exo and Endo Reactions. We also lernt about their diagrams. The Important concept behind the two distinct diagrams is the Reactant, Product, Activation Energy, Change in Enthalpy, Activated Complex and the Change in Enthalpy. Therefore these are the things we need to focus on in this lesson.
Endothermic reactions: the products have more energy than the reactants. Heat is absorbed from the surroundings (e.g., a cold pack).
Reactant: The reacant will have lower energy than the product since energy is absored during the reaction
Product: The product will gain energy. Thus have more energy than before
Change in Enthalpy: Delta H>0
Exothermic reactions: the products have less energy than the reactants. Heat is released to the surroundings (e.g., a heat pack).
Reactant: The reactant will have higher energy than before since energy is released during the reaction.
Product: The product will have lower energy than before because heat is released.
Change in Enthalpy: Delta H<0
Activation Energy: It is energy required from the reactant to make it to the tob of the Activation complex. This can be calculated by energy of the product - the energy of the reactant.
Activation Complex: It is the peak of the porabola on the energy diagram. It is located usually in the middle of the graph
Change in Enthalpy: It is change in energy between the reactant and the product. This is calcuated by useing the energy of the product to minus the energy of the reactant.
Both reactions require some activation energy to begin the reaction.
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