Which of the following best explains why standard enthalpies of formation of compoundsat 25 oC may be either positive or negative?a) Enthalpies of formation of compounds are relative to a reference concentration of 1M, forwhich the enthalpy of formation equals zero. Depending on the compound, formation may eitherrelease energy (in which case the enthalpy of formation will be positive) or absorb energy (inwhich case the enthalpy of formation will be negative).b) Enthalpies of formation of compounds are relative to their elements in standard states, forwhich the enthalpy of formation equals zero. Depending on the compound, formation may eitherrelease energy (in which case the enthalpy of formation will be positive) or absorb energy (inwhich case the enthalpy of formation will be negative).c) Enthalpies of formation of compounds are relative to their elements in standard states, forwhich the enthalpy of formation equals zero. Depending on the compound, formation may eitherrelease energy (in which case the enthalpy of formation will be negative) or absorb energy (inwhich case the enthalpy of formation will be positive).d) The statement is false – enthalpies of formation of compounds should always be positivebecause it always requires energy to break bonds and form compounds from elements.e) Enthalpies of formation of compounds are relative to a reference concentration of 1M, forwhich the enthalpy of formation equals zero.release energy (in which case the enthalpy of formation will be negative) or absorb energy (inwhich case the enthalpy of formation will be positive).Depending on the compound, formation may either

Enthalpy of formation for a compound is defined as the enthalpy required to form a compound from its…

Answered: Which of the following best explains…

Which of the following best explains why standard enthalpies of formation of compounds at 25 oC may be either positive or negative?

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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Question

Which of the following best explains why standard enthalpies of formation of compounds
at 25 oC may be either positive or negative?
a) Enthalpies of formation of compounds are relative to a reference concentration of 1M, for
which the enthalpy of formation equals zero. Depending on the compound, formation may either
release energy (in which case the enthalpy of formation will be positive) or absorb energy (in
which case the enthalpy of formation will be negative).
b) Enthalpies of formation of compounds are relative to their elements in standard states, for
which the enthalpy of formation equals zero. Depending on the compound, formation may either
release energy (in which case the enthalpy of formation will be positive) or absorb energy (in
which case the enthalpy of formation will be negative).
c) Enthalpies of formation of compounds are relative to their elements in standard states, for
which the enthalpy of formation equals zero. Depending on the compound, formation may either
release energy (in which case the enthalpy of formation will be negative) or absorb energy (in
which case the enthalpy of formation will be positive).
d) The statement is false – enthalpies of formation of compounds should always be positive
because it always requires energy to break bonds and form compounds from elements.
e) Enthalpies of formation of compounds are relative to a reference concentration of 1M, for
which the enthalpy of formation equals zero.
release energy (in which case the enthalpy of formation will be negative) or absorb energy (in
which case the enthalpy of formation will be positive).
Depending on the compound, formation may either

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