Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? Drag the appropriate items to their respective bins.
Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? Drag the appropriate items to their respective bins.
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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
Transcribed Image Text:Constants I Periodic Table
The standard free energy of formation, AG; , of a substance is
the free energy change for the formation of one mole of the
substance from the component elements in their standard
states. These values are applicable at 25°C and are found in
thermodynamic tables.
Part A
Based on the standard free energies of formation, which of the following reactions
represent a feasible way to synthesize the product?
The value of AG; for a substance gives a measure of the
thermodynamic stability with respect to the component
elements. Negative values for a formation reaction indicate
thermodynamic stability of the product. In other words, the
compound formed does not spontaneously decompose back
into the component elements. Positive values for a formation
reaction indicate thermodynamic instability of the product.
Thus, the compound will spontaneously decompose, though
the rate may be slow.
Drag the appropriate items to their respective bins.
Reset
Не
2Na(s) + O2(g)→N22O2(s)
AG: = -451.0 kJ/mol
2C(s) + 2H2(g)¬→C2H4(g)
AG; = 68.20 kJ/mol
The sign of AG; can be used to predict the feasibility of
synthesizing a substance from its component elements. The
standard free energy change for a reaction, AG°, is a state
function and can be calculated from the standard free energies
of formation as follows:
S(s) + O2(g)→SO2(g)
AG; = -300.1 kJ/mol
N2(g) + 202(g)→2NO2(g)
AG; = 102.6 kJ/mol
AGixn = EpAG; (products) – En AG; (reactants)
Feasible synthesis
Not a feasible synthesis
where no and n represent the stoichiometric coefficients in
the balanced chemical equation for the reactants and products
respectively.
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