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
Question
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
Solution
The correct description of the enthalpy of a reaction is A. The enthalpy of a reaction does not depend on the intermediate reactions.
Enthalpy of a reaction, often symbolized by ΔH, is a measure of the total energy of a thermodynamic system. It includes the internal energy of the system as well as the energy associated with the pressure-volume work done by the system.
According to Hess's Law, the total enthalpy change of a reaction is the sum of the enthalpy changes of the individual steps into which a reaction can be divided, and it does not depend on the pathway or the number of intermediate steps of a reaction. Therefore, the enthalpy of a reaction does not depend on the intermediate reactions.
Similar Questions
Which is true of the enthalpy of a reaction?A.Its value is the same as the enthalpy of each intermediate reactionB.Its value depends on which reactions are addedC.Its value is always a negative kJ/molD.Its value does not depend on which reactions are added
What is enthalpy?A.Enthalpy is the heat involved in a reaction.B.Enthalpy is the temperature of a reaction.C.Enthalpy is the mass involved in a reaction.D.Enthalpy is the kinetic energy of a system.SUBMITarrow_backPREVIOUS
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
What is the enthalpy of reaction?A.The heat released or absorbed in a reactionB.The amount of mass involved in a reactionC.The amount of heat a substance can holdD.A measure of the temperature of a system
The enthalpy of a reaction is +270 kJ/mol. What can you determine about the reaction?A.It is exothermic.B.It is nonspontaneous.C.It is endothermic.D.It is spontaneous.
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