Question

In: Chemistry

Does the number of moles of products increase, decrease, or remain the same when each of...

Does the number of moles of products increase, decrease, or remain the same when each of the following equilibria is subjected to an increase in pressure by decreasing the volume?

1- CO(g)+H2O(g)⇌CO2(g)+H2(g)

2- 2CO(g)⇌C(s)+CO2(g)

3- N2O4(g)⇌2NO2(g)

_______________________________________________

Ethyl acetate, a solvent used in many fingernail-polish removers, is made by the reaction of acetic acid with ethanol:
CH3CO2H(soln)Aceticacid +C2H5OH(soln)Ethanol⇌CH3CO2H(soln)Ethylacetate+H2O(soln)ΔH∘=−2.9kJ

Part A

Does the amount of ethyl acetate in an equilibrium mixture increase or decrease when the temperature is increased?

	increase
	decrease

Part B

How does Kc change when the temperature is decreased? Justify your answers using Le Chatelier's principle.

How does change when the temperature is decreased? Justify your answers using Le Chatelier's principle.

	As the temperature is decreased, the reaction shifts from left to right. The product concentrations increase, and the reactant concentrations decrease. This corresponds to an increase in Kc.
	As the temperature is decreased, the reaction shifts from right to left. The product concentrations decrease, and the reactant concentrations increase. This corresponds to an decrease in Kc.
	As there is neither products no reactants in gas state the temperature does not shift the reaction. So decrease in temperature does not change Kc.

________________________________________________________

A platinum catalyst is used in automobile catalytic converters to hasten the oxidation of carbon monoxide:
2CO(g)+O2(g)⇌Pt2CO2(g)ΔH∘=−566kJ
Suppose that you have a reaction vessel containing an equilibrium mixture of CO(g), O2(g), and CO2(g). Under the following conditions, will the amount of CO increase, decrease, or remain the same after each of the following changes?

A platinum catalyst is added.

	increase
	decrease
	remain the same

The temperature is increased.

	increase
	decrease
	remain the same

The pressure is increased by decreasing the volume.

	increase
	decrease
	remain the same

The pressure is increased by adding argon gas.

	increase
	decrease
	remain the same

The pressure is increased by adding gas.

	increase
	decrease
	remain the same

Expert Solution

queen_honey_blossom answered 2 years ago

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