15.1.3 Converting Between Kc and Kp Flashcards
In the ideal gas equation, the volume, V, ____________________
varies inversely with pressure.
True or false?
The term Δn, in the equation relating Kp and Kc, the value for Kp = Kc (RT)Δn, cannot be zero.
false
Ammonia is synthesized in the following reaction:
N2(g) + 3H2(g) —> 2NH3(g)
The Kc and Kp values were 0.105 and 0.000028, respectively. At what temperature did this reaction take place? (The value of R is 0.0821 Latm/molK)
745 K
For the following reaction:
4NH3(g) + 3O2(g) —> 2N2(g) + 6H2O(g)
What is the value of delta (triangle) n?
1
For the following reaction, the equilibrium constant Kp is 0.0005 at 300 degrees C. What is the value of Kc? (The value of R is 0.0821 Latm/molK)
2SO3(g) —> 2SO2(g) + O2(g)
0.0000106
For the following reaction in which ammonia is synthesized, the equilibrium constant, Kc, is 0.65 at 375 degrees C.
N2(g) + 3H2(g) —> 2NH3(g)
Initial concentration of H2, N2, and NH3 are 0.76M, 0.60M, and 0.48M, respectively. In which direction will the reaction proceed to reach equilibrium?
right to left
The Haber process involves the synthesis of ammonia from nitrogen and hydrogen.
N2(g) + 3H2(g) 2NH3(g)
For this reaction, the equilibrium, constant Kp = 0.00043 at 397 degrees C. What is the value of Kc? (R = 0.0821 Latm/molK)
1.3
In a reaction, gaseous reactants react to give gaseous products. How is the concentration of the reactants and products related to their pressures?
directly
When two grams of calcium carbonate are heated in a closed 4 L vessel, the following equilibrium is achieved:
CaCO3(s) CaO(s) +CO2(g)
At 800 degrees C, the partial pressure of CO2 is 0.236 atmospheres. What is the value of Kc? (R = 0.0821 Latm/molK)
2.68 x 10^-3
At 20 degrees C, the vapor pressure of water is 0.0231 atm. What are the values of Kp and Kc for this process?
H2O(l) H2O(g)
Kp = 0.0231 and Kc = 9.6 x 10^-4
