Skip to main content
Ch.15 - Chemical Equilibrium
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232Non è quello che usi tu?Cambia libro di testo
Tutti i libri di testoBrown 14th EditionCh.15 - Chemical EquilibriumProblema 100a
Capitolo 15, Problema 100a

In Section 11.5, we defined the vapor pressure of a liquid in terms of an equilibrium. (a) Write the equation representing the equilibrium between liquid water and water vapor and the corresponding expression for Kp.

Guida verificata passo dopo passo
1
Identify the equilibrium process: The equilibrium between liquid water and water vapor can be represented by the phase change process where liquid water (H2O(l)) is in equilibrium with its vapor (H2O(g)).
Write the chemical equation for the equilibrium: H2O(l) \(\rightleftharpoons\) H2O(g).
Understand the concept of equilibrium constant (Kp): Kp is the equilibrium constant for reactions involving gases and is expressed in terms of partial pressures.
Write the expression for Kp: For the equilibrium H2O(l) \(\rightleftharpoons\) H2O(g), the expression for Kp is Kp = P_{H2O(g)}, where P_{H2O(g)} is the partial pressure of water vapor.
Note that the concentration of the liquid phase is not included in the Kp expression because it is a pure liquid and its activity is considered to be 1.

Risposta video verificata per un problema simile:

Questa soluzione video è stata consigliata dai nostri tutor come utile per risolvere questo problema.
Durata del video:
1m

Concetti chiave

Ecco i concetti essenziali che devi comprendere per rispondere correttamente alla domanda.

Vapor Pressure

Vapor pressure is the pressure exerted by a vapor in equilibrium with its liquid or solid phase at a given temperature. It reflects the tendency of particles to escape from the liquid phase into the vapor phase. The higher the vapor pressure, the more volatile the substance, indicating a greater number of molecules transitioning into the vapor state.
Video consigliato:
Percorso guidato
02:40
Raoult's Law and Vapor Pressure

Equilibrium Constant (Kp)

The equilibrium constant, Kp, is a numerical value that expresses the ratio of the partial pressures of the products to the reactants at equilibrium for a given reaction. For the equilibrium between liquid water and water vapor, Kp can be expressed as the ratio of the vapor pressure of water to the pressure of the liquid phase, reflecting the balance between the two states.
Video consigliato:
Percorso guidato
03:20
Equilibrium Constant Expressions

Chemical Equilibrium

Chemical equilibrium occurs when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products over time. In the context of vapor pressure, this means that the rate at which water molecules evaporate into vapor equals the rate at which vapor molecules condense back into liquid, establishing a stable vapor pressure.
Video consigliato:
Percorso guidato
04:21
Chemical Equilibrium Concepts
Pratica correlata
Domanda del libro di testo

In Section 11.5, we defined the vapor pressure of a liquid in terms of an equilibrium. (b) By using data in Appendix B, give the value of Kp for this reaction at 30 C.

329
views
Domanda del libro di testo

The phase diagram for SO2 is shown here. (d) At which of the three points marked in red does SO2(g) most closely approach ideal-gas behavior?

767
views
Domanda del libro di testo

The phase diagram for SO2 is shown here. (e) At which of the three red points does SO2(g) behave least ideally?

1361
views
Domanda del libro di testo

In Section 11.5, we defined the vapor pressure of a liquid in terms of an equilibrium. (c) What is the value of Kp for any liquid in equilibrium with its vapor at the normal boiling point of the liquid?

493
views