The reaction SiO₂(s) + Pb(s) → PbO2(s) + Si(s) is spontaneous:AGf (PbO₂(s)) = -217 kJ/molAGf (SiO2(s)) = -856 kJ/molTrue or False

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Answered: The reaction SiO2 (s) + Pb(s) → PbO2(s)…

The reaction SiO2 (s) + Pb(s) → PbO2(s) + Si(s) is spontaneous: AGf (PbO2(s)) = -217 kJ/mol AGF (SiO2 (s)) = -856 kJ/mol

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter16: Spontaneity, Entropy, And Free Energy

Section: Chapter Questions

Problem 48E

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Concept explainers

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.

Question

The reaction SiO₂(s) + Pb(s) → PbO2(s) + Si(s) is spontaneous:
AGf (PbO₂(s)) = -217 kJ/mol
AGf (SiO2(s)) = -856 kJ/mol
True or False

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