An equilibrium mixture at 700 k of 0.05 m ng,0.3 m hg and 0.2 m nh3g i...
An equilibrium mixture at 700 k of 0.05 m ng,0.3 m hg and 0.2 m nh3g i...
Introduction:
In this question, we are given an equilibrium mixture of gases at a certain temperature. The mixture contains nitrogen gas (N2), ammonia gas (NH3), and hydrogen gas (H2). The initial concentrations of these gases are given, and we are asked to determine the appropriate graph that represents the situation after adding more nitrogen gas to the mixture.
Explanation:
To solve this problem, we need to understand the effects of adding nitrogen gas to the equilibrium mixture. When N2 is added, it will react with hydrogen gas to form ammonia gas according to the following equation:
N2(g) + 3H2(g) ⇌ 2NH3(g)
This reaction is an exothermic reaction, which means it releases heat. According to Le Chatelier's principle, when heat is added to an exothermic reaction, the equilibrium will shift in the direction that consumes the excess heat. In this case, adding N2 will increase the concentration of N2, causing the equilibrium to shift towards the formation of NH3.
Effect on NH3 concentration:
Since the equilibrium will shift towards the formation of NH3, the concentration of NH3 will increase. The initial concentration of NH3 is 0.2 M, and adding N2 will further increase its concentration.
Effect on N2 concentration:
Adding N2 will increase the concentration of N2 in the mixture. The initial concentration of N2 is not given, but it is stated that the concentration of N2 becomes 0.15 M just after addition. Therefore, the concentration of N2 will increase from its initial value to 0.15 M.
Effect on H2 concentration:
Adding N2 will cause the equilibrium to shift towards the formation of NH3, resulting in a decrease in the concentration of H2. However, the initial concentration of H2 is not given, so we cannot determine the exact change in its concentration.
Graph representation:
Based on the information given, the appropriate graph that represents the situation after adding N2 is the graph that shows an increase in the concentration of NH3 and N2, and a decrease in the concentration of H2.
Conclusion:
In summary, adding N2 to the equilibrium mixture will shift the equilibrium towards the formation of NH3. The concentration of NH3 and N2 will increase, while the concentration of H2 will decrease. The appropriate graph representation for this situation would show an increase in NH3 and N2 concentrations, and a decrease in H2 concentration.
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