What part of a potential energy diagram reveals the enthalpy of reaction?A.The difference in energy between the reactants and the activation energyB.The difference in energy between the activation energy and the productsC.The difference in potential energy between the reactants and productsD.The potential energy of the reactants plus the potential energy of the products
Question
What part of a potential energy diagram reveals the enthalpy of reaction?A.The difference in energy between the reactants and the activation energyB.The difference in energy between the activation energy and the productsC.The difference in potential energy between the reactants and productsD.The potential energy of the reactants plus the potential energy of the products
Solution
The part of a potential energy diagram that reveals the enthalpy of reaction is C. The difference in potential energy between the reactants and products.
Here's why:
Enthalpy of reaction, also known as heat of reaction, is the total energy change during a chemical reaction. It is represented by the symbol ΔH.
In a potential energy diagram:
- The energy level of the reactants is the energy content of the reactants before the reaction starts.
- The energy level of the products is the energy content of the products after the reaction has occurred.
The difference in potential energy between the reactants and the products (ΔH) is the enthalpy of reaction. If the products have less energy than the reactants, the ΔH is negative and the reaction is exothermic (releases heat). If the products have more energy than the reactants, the ΔH is positive and the reaction is endothermic (absorbs heat).
Similar Questions
Which statement describes the potential energy diagram of an exothermic reaction?A.The activation energy of the reactants is greater than the activation energy of the products.B.The potential energy of the products is equal to the potential energy of the reactants.C.The potential energy of the products is greater than the potential energy of the reactants.D.The potential energy of the reactants is greater than the potential energy of the products.
Which is a correct description of the enthalpy of a reaction?A.The enthalpy of a reaction does not depend on the intermediate reactionsB.The enthalpy of a reaction is the same as each intermediate reactionC.The enthalpy of a reaction depends on the intermediate reactionsD.The enthalpy of a reaction is always positive
What does a positive H look like on a potential energy diagram?A.The potential energy of the reactants is greater than the potential energy of the products.B.The potential energy of the products is greater than the potential energy of the reactants.C.The activation energy of the reactants is less than the activation energy of the products.D.The potential energy of the products is equal to the potential energy of the reactants.SUBMITarrow_backPREVIOUS
The diagram shows that the energy of the products is higher than the energy of the reactants. Therefore, the diagram represents a(n) reaction.
E. Mark each description as an exothermic or endothermic reaction. (2 points) Description Exothermic Endothermic A + heat B–ΔHEnergy diagram:Energy of reactants greater than energy of products
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