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Hydrogen and fluorine react to form hydrogen fluoride, like this: H₂(9)+F(9)→ 2 HF (g) The reaction is exothermic. Suppose a mixture of H₂, F₂ and HF has come to equilibrium in a closed reaction vessel. Predict what change, if any, t perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or perturbation The temperature is lowered change in composition The pressure of Hy will The temperature is raised. The pressure of HF will 8 8 shift in equilibrium Oto the right to the left (none) to the right to the left X (none)

Hydrogen and fluorine react to form hydrogen fluoride, like this: H₂(9)+F(9)→ 2 HF (g) The reaction is exothermic. Suppose a mixture of H₂, F₂ and HF has come to equilibrium in a closed reaction vessel. Predict what change, if any, t perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or perturbation The temperature is lowered change in composition The pressure of Hy will The temperature is raised. The pressure of HF will 8 8 shift in equilibrium Oto the right to the left (none) to the right to the left X (none)

Chemistry for Engineering Students
Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter10: Entropy And The Second Law Of Thermodynamics
Section: Chapter Questions
Problem 10.50PAE: For the reaction NO(g)+NO2(g)N2O3(g) , use tabulated thermodynamic data to calculate H and S. Then...
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Hydrogen and fluorine react to form hydrogen fluoride, like this: H₂(g) + F₂(g) → 2 HF (9) The reaction is exothermic. Suppose a mixture of H₂, F₂ and HF has come to equilibrium in a closed reaction vessel. Predict what change, if any, t perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or perturbation The temperature is lowered change in composition The pressure of H₂ will The temperature is raised. The pressure of HF will 7 8 shift in equilibrium to to the left (none) the right X to the right to the left. (none)
Transcribed Image Text:Hydrogen and fluorine react to form hydrogen fluoride, like this: H₂(g) + F₂(g) → 2 HF (9) The reaction is exothermic. Suppose a mixture of H₂, F₂ and HF has come to equilibrium in a closed reaction vessel. Predict what change, if any, t perturbations in the table below will cause in the composition of the mixture in the vessel. Also decide whether the equilibrium shifts to the right or perturbation The temperature is lowered change in composition The pressure of H₂ will The temperature is raised. The pressure of HF will 7 8 shift in equilibrium to to the left (none) the right X to the right to the left. (none)
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and r AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction A B C observations This reaction is spontaneous except above -26. °C. This reaction is always spontaneous, but proceeds slower at temperatures above. -32. °C. This reaction is exothermic and proceeds faster at temperatures above 81. °C. conclusions AH is As is All is AS is All is AS is negative negative B negative B positive 8 negative B unknown
Transcribed Image Text:Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and r AS. Note: if you have not been given enough information to decide a sign, select the "unknown" option. reaction A B C observations This reaction is spontaneous except above -26. °C. This reaction is always spontaneous, but proceeds slower at temperatures above. -32. °C. This reaction is exothermic and proceeds faster at temperatures above 81. °C. conclusions AH is As is All is AS is All is AS is negative negative B negative B positive 8 negative B unknown
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