Consider the reaction CS 2 ( g ) + 4 H 2 ( g ) ⇌ CH 4 ( g ) + 2 H 2 S ( g ) Calculate Δ H° , Δ S° , and Δ G° at 25°C for this reaction. Assume Δ H° and Δ S° are constant with respect to a change of temperature. Now calculate Δ G ° at 650°C. Compare the two values of Δ G °. Briefly discuss the spontaneity of the reaction at 25°C and at 650°C.
Consider the reaction CS 2 ( g ) + 4 H 2 ( g ) ⇌ CH 4 ( g ) + 2 H 2 S ( g ) Calculate Δ H° , Δ S° , and Δ G° at 25°C for this reaction. Assume Δ H° and Δ S° are constant with respect to a change of temperature. Now calculate Δ G ° at 650°C. Compare the two values of Δ G °. Briefly discuss the spontaneity of the reaction at 25°C and at 650°C.
Solution Summary: The author explains that the chemical or physical change can take place by itself without the help of surroundings.
Author: Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
CS
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Calculate ΔH°, ΔS°, and ΔG° at 25°C for this reaction. Assume ΔH° and ΔS° are constant with respect to a change of temperature. Now calculate ΔG° at 650°C. Compare the two values of ΔG°. Briefly discuss the spontaneity of the reaction at 25°C and at 650°C.
The standard Gibbs energies of formation of CaO(s), CaCO3 (calcite), and CO2 (g) are
-604.04, -1128.80, and -394.37 kJ/mol, respectively. Find the value of AG, and Keq for the
following reaction:
CaCO3 CaO (s) + CO2 (g)
[ap
A dry mixture containing 1 g of each solid [CaCO3(s) and CaO(s)] is on the lab bench in
contact with the atmosphere, which contains a partial pressure of 10-35 bar CO2 (g). What is
the total Gibbs free energy of the system containing all three species before any reaction has
happened? Does the equilibrium driving force favor conversion of one of the solids into the
other, or are the solids equilibrated with one another?
Classification of boranes.
Chapter 18 Solutions
General Chemistry - Standalone book (MindTap Course List)
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
The Laws of Thermodynamics, Entropy, and Gibbs Free Energy; Author: Professor Dave Explains;https://www.youtube.com/watch?v=8N1BxHgsoOw;License: Standard YouTube License, CC-BY