What is Hess's law?A.Hess's law states that the enthalpy of a reaction does not depend on the reaction path.B.Hess's law states that the enthalpy of a reaction changes with temperature.C.Hess's law states that the enthalpy of a reaction depends on the reaction path.D.Hess's law states that only changes in enthalpy of a reaction can be known.

What does Hess's law state?A.The enthalpy of a reaction is the sum of the enthalpies of intermediate reactions.B.The enthalpy of a reaction can be measured from heat produced in a calorimeter.C.The enthalpy of a reaction is positive if it is endothermic and negative if exothermic.D.The enthalpy of a reaction can be determined only from single-step reactions.SUBMITarrow_backPREVIOUS

What does Hess's law state about the total enthalpy change for a reaction?A.It depends on the reaction pathway.B.It is independent of the reaction pathway.C.It must be determined experimentally.D.It can only be calculated from the equilibrium constant.SUBMITarrow_backPREVIOUS

How is Hess's law used to calculate the enthalpy of a reaction?A.The desired enthalpy is obtained through adding intermediate reactions together.B.The enthalpy is obtained from the difference in final and initial reactions in a path.C.The final equation in a reaction path provides the enthalpy for the desired reaction.D.Enthalpies from similar equations are substituted for unknown reaction enthalpies.SUBMITarrow_backPREVIOUS

How is Hess's law used to measure enthalpy of a desired reaction?A.Intermediate equations with known enthalpies are added together.B.The enthalpy from the final equation in a series of reactions is used.C.The enthalpy is determined from the enthalpy of similar reactions.D.The enthalpy is obtained from the enthalpy of an intermediate step.

Hess's law