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

Answer 1

Answer:

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 2

Answer: 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.

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Answers

The universe is expanding is as the galaxies are moving away from each other, and the temperature of the universe is decreasing. Therefore, option (1) is correct.

How is the universe expanding?

First scientists theorized that as the universe is expanding and its temperature has gradually decreased. The universe has been expanding since the Big Bang and, as it expands, it’s temperature cooling down.

The temperature of the universe can be measured by looking at the cosmicmicrowave background (CMB). The temperature an be estimated by the thermal radiation left over from the BigBang.

The CMB scientists have been investigating that its temperature has been dropping off gradually as our universe expands out and the current average temperature of the cosmos is estimated about 2.73 Kelvin.

The point of the Big Bang from the Big bang theory is described as densesingularity and infinitely hot. The energy from the Big Bang distributed as the universe expands and gives the cooling effect.

But new research suggests otherwise that the temperature of the earth is actually increasing as it expands. Therefore, the temperature of universe increasing with its expansion.

Learn more about universe expanding, here:

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the galaxies are moving away from each other and the temps are decreasing

Na2S2O3 + KBrO3 + H2SO4 = Na2S4O6 + K2SO4 + Na2SO4 + Br2 + H2O

Answers

It helps writing it down on a piece of paper, and doing these problems with a pencil and good eraser. I like to make a grid at the bottom of my paper listing all the elements on the left side and the right side to see which part of the equation I need to balance.

22 Na2S2O3 + 10 KBrO3 + 7 H2SO4 = 8 Na2S4O6 + 5 K2SO4 + 14 Na2HSO4 + 5 Br2

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(D) Al^{3+}
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Answers

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Answers

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Answers

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