Problem: Consider the following equilibrium:A(g) + B2(g) ⇌ AB2(g);            ∆H = -92 kJThe concentration of A at equilibrium may be increased byA) decreasing the temperature.B) adding B2 to the system.C) adding a catalyst.D) increasing the pressure.E) adding AB2 to the system.

FREE Expert Solution

We’re being asked to identify the correct condition that will increase the concentration of A at equilibrium:

A(g) + B2(g) ⇌ AB2(g);            ∆H = -92 kJ

According to Le Chatelier’s Principle, if a system (chemical reaction) is at equilibrium and we disturb it, then the system will readjust to maintain its equilibrium state.

Since the reaction is exothermic, ΔH = (–), heat is given off as a product:

A(g) + B2(g) ⇌ AB2(g) + heat

Now, let’s look at each given statement.

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Problem Details

Consider the following equilibrium:

A(g) + B2(g) ⇌ AB2(g);            ∆H = -92 kJ

The concentration of A at equilibrium may be increased by

A) decreasing the temperature.

B) adding B2 to the system.

C) adding a catalyst.

D) increasing the pressure.

E) adding AB2 to the system.

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Le Chatelier's Principle concept. You can view video lessons to learn Le Chatelier's Principle . Or if you need more Le Chatelier's Principle practice, you can also practice Le Chatelier's Principle practice problems.