Using ONLY the information given by the equation, which of the following changes would increase the molar concentration at equilibrium of the product N2O4(g)?
A. Increase in pressure
B. Increase in temperature
C. Decrease in the concentration of NO2(g)
D. Decrease in temperature
E. Decrease in pressure
Consider the equation 2NO2(g) <--> N2O4(g).?
2018-03-19 9:52 pm
回答 (3)
2018-03-19 11:53 pm
A. is true.
In the equation, there are 2 moles of gaseous molecules on the left and 1 mole on the right.
When pressure increases, according to Le Chatelier's principle, the equilibrium position would shift to the right in order to decrease the number of moles of gaseous molecules. This will increase the concentration of N₂O₄.
B and D are undetermined.
The effect on shift of equilibrium position depends on whether the forward/backward reactions are exothermic or endothermic. However, no such information are given in the equation.
C. is false.
When the concentration of NO₂ decreases, according to Le Chatelier's principle, the equilibrium position would shift to the left to counteract the loss of NO₂. This will decrease trhe concentration of N₂O₄.
E. is false.
Contrast to A., the equilibrium position would shift to the left in order to increase the number of moles of gaseous molecules. This will decrease the concentration of N₂O₄.
The answer: A. Increase in pressure
In the equation, there are 2 moles of gaseous molecules on the left and 1 mole on the right.
When pressure increases, according to Le Chatelier's principle, the equilibrium position would shift to the right in order to decrease the number of moles of gaseous molecules. This will increase the concentration of N₂O₄.
B and D are undetermined.
The effect on shift of equilibrium position depends on whether the forward/backward reactions are exothermic or endothermic. However, no such information are given in the equation.
C. is false.
When the concentration of NO₂ decreases, according to Le Chatelier's principle, the equilibrium position would shift to the left to counteract the loss of NO₂. This will decrease trhe concentration of N₂O₄.
E. is false.
Contrast to A., the equilibrium position would shift to the left in order to increase the number of moles of gaseous molecules. This will decrease the concentration of N₂O₄.
The answer: A. Increase in pressure
2018-03-19 10:46 pm
Increasing the pressure.
2018-03-19 9:59 pm
A. Increase in pressure
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