Question

An endothermic reaction 3A + 4B ←→ 3C is heated from 20 degrees Celsius to 45...

An endothermic reaction 3A + 4B ←→ 3C is heated from 20 degrees Celsius to 45 degrees Celsius. In which direction will the reaction proceed to reach equilibrium? (1 point ) *

No change

None of the above

Products

To the side with the least moles

Question 16

The reaction: 2CO(g) + O2(g) ←→ 2CO2(g) is at equilibrium in a piston. Suddenly, the volume is decreased to ¼ of the initial volume. In which direction will the reaction shifts towards to reestablish equilibrium? (1 point ) *

No change

None of the above

Products

Reactants if it is endothermic

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Homework Answers

Answer #1

1) If the temperature is increased then reaction proceed in the direction in which heat is absorbed. In an endothermic reaction heat is absorbed in forward direction. So here the reaction shift to products side to reach equilibrium.

Correct answer is option C.

2) when the volume is decreased the pressure of the system increase. As per Le Chatelier's principle, the reaction will shift in the direction in which pressure can be decreased. Since pressure is directly proportional to number of moles of gas hence reaction proceed in a direction in which number of moles of gases decrease. So here the reaction shift towards product to reach the equilibrium.

Correct answer is option C.

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