Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constant for this reaction using the Δ? values in the table. SubstanceΔ?∘fΔGf° (kJ/mol)H2CO3(aq)−616.1H2O(l)−237.1CO2(g)−394.4K= ____________________ Carbonic acid then ionizes in water (?a1=4.5×10−7). Ignoring ?a2, estimate ? for the overall process by which CO2 and H2Oform H+ and HCO−3.?= What is the pressure of CO2 in equilibrium with carbonated water at 25 °C and pH=4.67??CO2=

The equilibrium constant of a chemical reaction relates the concentration of reactants and products,…

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Chemistry & Chemical Reactivity

9th Edition

ISBN:9781133949640

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter18: Principles Of Chemical Reactivity: Entropy And Free Energy

Section: Chapter Questions

Problem 26PS: Calculate rH and rS for the reaction of tin(IV) oxide with carbon. SnO2(s) + C(s) Sn(s) + CO2(g)...

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Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constant for this reaction using the Δ? values in the table.

Substance	Δ?∘fΔGf° (kJ/mol)
H2CO3(aq)	−616.1
H2O(l)	−237.1
CO2(g)	−394.4

K= ____________________

Carbonic acid then ionizes in water (?a1=4.5×10−7). Ignoring ?a2, estimate ? for the overall process by which CO₂ and H2Oform H+ and HCO−3.

What is the pressure of CO2 in equilibrium with carbonated water at 25 °C and pH=4.67?

?CO2=

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