What is the expression for Kp for the following reaction? A(g) = B(g) + 2C(g)

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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**Question:**

What is the expression for \( K_p \) for the following reaction?

\[ \text{A(g)} \rightleftharpoons \text{B(g)} + 2\text{C(g)} \]

**Explanation:**

The equilibrium constant expression for partial pressures (\( K_p \)) is derived from the balanced chemical equation. For the given reaction:

\[ \text{A(g)} \rightleftharpoons \text{B(g)} + 2\text{C(g)} \]

The expression for \( K_p \) can be written as:

\[ K_p = \frac{P_{\text{B}} \times P_{\text{C}}^2}{P_{\text{A}}} \]

where:
- \( P_{\text{B}} \) is the partial pressure of B,
- \( P_{\text{C}} \) is the partial pressure of C,
- \( P_{\text{A}} \) is the partial pressure of A. 

In this equation, the coefficients from the balanced equation are used as exponents for the partial pressures.
Transcribed Image Text:**Question:** What is the expression for \( K_p \) for the following reaction? \[ \text{A(g)} \rightleftharpoons \text{B(g)} + 2\text{C(g)} \] **Explanation:** The equilibrium constant expression for partial pressures (\( K_p \)) is derived from the balanced chemical equation. For the given reaction: \[ \text{A(g)} \rightleftharpoons \text{B(g)} + 2\text{C(g)} \] The expression for \( K_p \) can be written as: \[ K_p = \frac{P_{\text{B}} \times P_{\text{C}}^2}{P_{\text{A}}} \] where: - \( P_{\text{B}} \) is the partial pressure of B, - \( P_{\text{C}} \) is the partial pressure of C, - \( P_{\text{A}} \) is the partial pressure of A. In this equation, the coefficients from the balanced equation are used as exponents for the partial pressures.
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