Endothermic reactions enthalpy level diagrams

An enthalpy level diagram for an endothermic reaction is Products... 

A potential energy diagram for an endothermic reaction is shown in Figure 6.13. The reactants at the beginning of the reaction are at a lower energy level than the products. The overall difference in potential energy between reactants and products is the enthalpy change. 

Endothermic reactions are reactions in which the specific enthalpy of the products E is greater than the specific enthalpy of the reactants Er E > Er), and the heat of reaction AHr is positive. Endothermic reactions take away heat from the reaction medium and hence require a continuous supply of heat. On the contrary, exothermic reactions are reactions in which Ep < Er and the heat of reaction AHr is negative. Exothermic reactions liberate heat to the reaction medium. The energy level diagram for the exothermic reaction is shown in Figure 2.2. 

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See also in sourсe #XX -- [ ]

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