Open Question
For each of the following equilibria, write the equilibrium constant expression for Kc. (a) CH4(g) + H2O(g) ⇌ CO(g) + 3 H2(g) (b) 3 F2(g) + Cl2(g) ⇌ 2 ClF3(g) (c) H2(g) + F2(g) ⇌ 2 HF(g)
Ch.15 - Chemical Equilibrium
Chapter 15, Problem 59
For each of the equilibria in Problem 15.57, write the equilibrium constant expression for Kp and give the equation that relates Kp and Kc for parts (a), (b), and (c).
Verified step by step guidance1
Step 1: Identify the chemical equilibrium reactions given in Problem 15.57. Each reaction will have a specific form, such as aA(g) + bB(g) ⇌ cC(g) + dD(g).
Step 2: Write the equilibrium constant expression for Kp for each reaction. Kp is expressed in terms of the partial pressures of the gases involved: Kp = (P_C^c * P_D^d) / (P_A^a * P_B^b), where P represents the partial pressure of each gas.
Step 3: Recall the relationship between Kp and Kc. The equation that relates Kp and Kc is: Kp = Kc(RT)^Δn, where R is the ideal gas constant (0.0821 L·atm/mol·K), T is the temperature in Kelvin, and Δn is the change in moles of gas (moles of gaseous products - moles of gaseous reactants).
Step 4: For each reaction, calculate Δn by subtracting the sum of the coefficients of the gaseous reactants from the sum of the coefficients of the gaseous products.
Step 5: Use the relationship Kp = Kc(RT)^Δn to express Kp in terms of Kc for each reaction, substituting the appropriate values for R, T, and Δn.
Related Practice
Open Question
For each of the following equilibria, write the equilibrium constant expression for Kc. (a) 2 C2H4(g) + O2(g) ⇌ 2 CH3CHO(g) (b) CO(g) + H2O(g) ⇌ CO2(g) + H2(g) (c) 4 NH3(g) + 5 O2(g) ⇌ 4 NO(g) + 6 H2O(g)
Textbook Question
For each of the equilibria in Problem 15.56, write the equi-librium constant expression for Kp and give the equation that relates Kp and Kc. (a)
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Textbook Question
The reaction 2 AsH31g2 ∆ As21g2 + 3 H21g2 has Kp = 7.2 * 107 at 1073 K. At the same temperature, what is Kp for each of the following reactions? (a) As21g2 + 3 H21g2 ∆ 2 AsH31g2
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Textbook Question
The vapor pressure of water at 25 °C is 0.0313 atm. Cal- culate the values of Kp and Kc at 25 °C for the equilibrium H2O1l2 ∆ H2O1g2.
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Open Question
Chlorine monoxide and dichlorine dioxide are involved in the catalytic destruction of stratospheric ozone. They are related by the equation 2 ClO(g) ⇌ Cl2O2(g) for which Kc is 4.96 * 10^11 at 253 K. For an equilibrium mixture in which [Cl2O2] is 6.00 * 10^-6 M, what is [ClO]?