The water-gas shift reaction plays a central role in the chemical methods for ob
ID: 812639 • Letter: T
Question
The water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal.
At a given temperature Kp = 2.7. If 0.19 mol CO, 0.51 mol H2O, 0.66 mol CO2 and 0.39 mol H2 are introduced into a 2.0 L flask, (a)what is the value of Qc?
(b)What is the value of Qp?
(c)In which direction must the reaction proceed to reach equilibrium?
The water - gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal. CO(g) + H2O(g) Right left harpoons CO2(g) + H2(g) At a given temperature Kp = 2.7. If 0.19 mol CO, 0.51 mol H2O, 0.66 mol CO2 and 0.39 mol H2 are introduced into a 2.0 L flask, (a)what is the value of Qc? (b)What is the value of Qp? (c)In which direction must the reaction proceed to reach equilibrium?Explanation / Answer
As for Qc, you want to first calculate the concentration (M) of each product/reactant which you probably know it's just moles over volume: .0.19mol CO/2L, .51mol H2O/2L, .66mol CO2/2L, and .39mol H2/2L. Values come out to .095, .255, .33, and .195
[.33][.195]/[.095][.255] = 2.65 = Qc
Because Qc < Kp (2.65 < 2.70), the reaction should shift to the right. if Q is bigger than K, the reaction shifts to the left.
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