Which of the following statements correctly defines Hess's Law? Hess's law states that if a reaction can be broken down into stepwise reactions, then the sum of the enthalpy change for all the steps is equal to the change in enthalpy for the net reaction. Hess's law states that the change in enthalpy for a reaction is obtained by subtracting the sum of enthalpies of formation of the reactants by their stoichiometric coefficients from the sum of the enthalpies of formation of the products multiplied by their stoichiometric coefficients. Hess's law states that the change in enthalpy for a reaction is obtained by determining the heat absorbed/released through calorimetry. Hess's law states that if a reaction can be broken down into standard enthalpy of formation reactions, then the sum of the enthalpy change for all the formation steps is equal to the change in enthalpy for the net reaction.

Which of the following statements correctly defines Hess's Law? Hess's law states that if a reaction can be broken down into stepwise reactions, then the sum of the enthalpy change for all the steps is equal to the change in enthalpy for the net reaction. Hess's law states that the change in enthalpy for a reaction is obtained by subtracting the sum of enthalpies of formation of the reactants by their stoichiometric coefficients from the sum of the enthalpies of formation of the products multiplied by their stoichiometric coefficients. Hess's law states that the change in enthalpy for a reaction is obtained by determining the heat absorbed/released through calorimetry. Hess's law states that if a reaction can be broken down into standard enthalpy of formation reactions, then the sum of the enthalpy change for all the formation steps is equal to the change in enthalpy for the net reaction.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Thermochemistry

Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.

Exergonic Reaction

The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.

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Which of the following statements correctly defines Hess's Law?
Hess's law states that if a reaction can be broken down into stepwise reactions, then the sum of
the enthalpy change for all the steps is equal to the change in enthalpy for the net reaction.
Hess's law states that the change in enthalpy for a reaction is obtained by subtracting the sum of
enthalpies of formation of the reactants by their stoichiometric coefficients from the sum of the
enthalpies of formation of the products multiplied by their stoichiometric coefficients.
Hess's law states that the change in enthalpy for a reaction is obtained by determining the heat
absorbed/released through calorimetry.
Hess's law states that if a reaction can be broken down into standard enthalpy of formation
reactions, then the sum of the enthalpy change for all the formation steps is equal to the change in
enthalpy for the net reaction.

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