The formation of ammonia from its elements is an important industrial process. 3

Question

The formation of ammonia from its elements is an important industrial process.

3H2(g) + N2(g) <=====> 2NH3(g)

1. Does the reaction shift to the right or to the left, or does it remain unchanged, when extra H2 is added?

2. Does the reaction shift to the right or to the left, or does it remain unchanged, when the volume of the system is increased?

3. For the equilibrium 2SO2(g) + O2(g) <=====> 2SO3(g), K has the following values: 4.0 x 10^24 at 300K, 2.5 x 10^10 at 500K, and 3.0 x 10^4 at 700K. Is this reaction exothermic or endothermic?

Please explain all answers

Explanation / Answer

1.) when extra H2 is added,  the reaction , it remain unchanged beacause the nitrogen is limited and the equilibrium depends upon both the gases. So, no effect when only one one gaseous element on left is introduced in excess.

2.) when the volume of the system is increased,  the reaction shift to the left.

Explanation :

According to le-chatliers principle, when the volume is increased the reaction will shift toeards the direction with more number of gaseous molecules so as to occupy the extra volume , therefore shift to left.

3.) The reaction is exothermic, as on increase of temperature the equilibrium consatant decreases.

Explanation:

Here, with the increase with the temperature, the equilibrium constant lowers to great extent, so the reaction does not preferably occur at high temperature, it occurs at low temperature, so at it means it does not requires heat for its reaction, it means it releases heat, to lower its temperature ,hence prefers low temperature, therefore exothermic.

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