Chemistry, 25.12.2019 20:31 tommylopez22713

Consider the following reversible, exothermic chemical reaction: 2c2h2(g) + 5o2(g) ↔4co2(g) + 2h2o(g)
all but one of the conditions will cause equilibrium to shift right and produce more of the products. which change will cause the reaction to shift to the left?
a) adding oxygen
b) adding co2
c) increasing the pressure
d) decreasing the temperature

Answers: 2

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Answers

Adding CO2 increases Q and makes Q > K (K being the equilibrium constant for this reaction). As a result, the reaction will favor reactants until Q=K, so adding CO2 causes the reaction to proceed to the left. B is the correct answer.

Answer from: yorylee

Answer : The correct option is, (B) adding CO_2

Explanation :

Le-Chatelier's principle : This principle states that if any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

Option A : adding oxygen

If the concentration of O_2 is increased on reactant side then the equilibrium will shift in the direction where decrease of concentration of O_2 takes place. Therefore, the equilibrium will shift in the right direction.

Option B : adding CO_2

If the concentration of CO_2 is increased on product side then the equilibrium will shift in the direction where decrease of concentration of CO_2 takes place. Therefore, the equilibrium will shift in the left direction.

Option C : increasing the pressure

If the pressure of the container is increased then the equilibrium will shift in the direction where the less number of moles of gas molecules is taking place. As the number of moles of gas molecules is greater at the product reactant side and less at product side. So, the equilibrium will shift in the right direction.

Option D : decreasing the temperature

As the given reaction is an exothermic reaction in which the heat is released during a chemical reaction. That means the temperature is decreased on the reactant side. If the temperature is decreased in the equilibrium then the equilibrium will shift in the direction where, temperature is getting increased. Thus, the reaction will shift to the right direction i.e, towards the product.

Answer from: Quest

a small container that holds a source of energy a solar cell that captures light energy and converts it into electricity a voltaic cell that uses the oxidation of a fuel to produce electricity

explanation:

Answer from: Quest

That result from subduction of oceanic plates beneath lighter continental plates. most of the earth's volcanoes are located around the pacific ring of fire because that the location of most of the earth's subduction zones.