We’re being asked to identify which change will increase the quantity of NO2 in the mixture for the exothermic reaction:
4 NH3(g) + 7 O2(g) ⇌ 4 NO2(g) + 6 H2O(g)
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:
4 NH3(g) + 7 O2(g) ⇌ 4 NO2(g) + 6 H2O(g) + heat
Now, let’s look at each given statement.
For the exothermic reaction 4 NH3(g) + 7 O2(g) => 4 NO2(g) + 6 H2O(g) which change will increase the quantity of NO2 in the mixture?
a. decreasing container volume
b. removing some NH3(g)
c. increasing the temperature
d. removing some O2(g)
e. adding some H2O(g)
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What scientific concept do you need to know in order to solve this problem?
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