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alwaysneedhelp84
10.11.2019 •
Chemistry
Select the best single answer. the water-gas shift reaction plays a central role in the chemical methods for obtaining cleaner fuels from coal: co(g) + h2o(g) ⇌ co2(g) + h2(g) at a given temperature, kp = 2.7. if 0.13 mol of co, 0.56 mol of h2o, 0.62 mol of co2, and 0.61 mol of h2 are put in a 2.0−l flask, in which direction does the reaction proceed?
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Ответ:
The reaction will proceed to the left
Explanation:
Step 1: The balanced equation
CO(g) + H2O(g) ⇌ CO2(g) + H2(g)
Step 2: Data given
Kp = 2.7
Number of moles of CO = 0.13 mol
Number of moles of H2O = 0.56 mol
Number of moles of CO2 = 0.62 mole
Number of moles of H2 = 0.61 mol
Volume = 2.0L
Step 3: Calculate Q
Pco = 0.13 / 1.92 P
Ph2o = 0.56 / 1.92 P
Pco2 = 0.62/1.92 P
Ph2 =0.61 / 1.92 P
Q = [CO2][H2] / [CO][H2O] = 5.2
Q > Kp The reaction will proceed to the left
The reaction will proceed in the reverse direction in order to increase the concentrations of both CO and H2O and decrease that of CO2 and H2 until Q = K.
Ответ:
Kerosene is lighter than water and so it floats on the water and continues to burn. Carbon (IV) oxide blankets the flame cutting off the supply of oxygen and extinguishing the fire.
Explanation:
As water is heavier than kerosene, it slips down permitting the kerosene to rise to the surface and continue to burn. Besides, the existing temperature is so high that the water poured on the fire would evaporate before it can extinguish the fire. Thus the kerosene fire cannot be extinguished with water.