in the exothermic reaction N2(g) + 3H(g) <==> 2NH3(g). if you increase the tempe

Question

in the exothermic reaction N2(g) + 3H(g) <==> 2NH3(g). if you increase the temperature what will happen to the nh3? also if you decrease the volume what will happen to the nh3? the Change H = -92.2kJ/mole and K=2.6 x 10^8

I asked this question the other day and got conflicting answers. So I need to know for sure.

The answers I got:
If the amount of H2 is decreased then the NH3 will increase and if the temp is increased the NH3 will increase, and if the volume decreases the NH3 will decrease as well.

Please help soon, Thanks

Explanation / Answer

For any exothermic reaction if you increase the temperature the reaction will shift to the left. So Concentration of NH3 will decrease. Decreasing the volume for a reaction in equilibrium is determined by number of moles of the participating molecules In this reaction in the reactants we have 1 N2 + 3 H2 = 4 moles (1+3) and in the products we have 2 NH3 = 2 moles so decrease of volume will cause a rise in the reactant concentration resulting the reaction to shift to the right. so decreasing volume will cause the right shift of the reaction.

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