Equal amounts of CH₄(ge) and H₂O(g) are added to a reaction vessel and allowed to react - VCE - SSCE Chemistry - Question 3 - 2008 - Paper 1
Question 3
Equal amounts of CH₄(ge) and H₂O(g) are added to a reaction vessel and allowed to react. After 10 minutes, equilibrium has been reached. At that time, some H₂ is add... show full transcript
Worked Solution & Example Answer:Equal amounts of CH₄(ge) and H₂O(g) are added to a reaction vessel and allowed to react - VCE - SSCE Chemistry - Question 3 - 2008 - Paper 1
Step 1
Identify the initial conditions of the reaction
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
At the beginning, equal amounts of CH₄ and H₂O are introduced into the reaction vessel. This leads to the formation of products until equilibrium is established after 10 minutes.
Step 2
Consider the effect of adding H₂ after equilibrium
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Once H₂ is added to the equilibrium mixture, the system will respond according to Le Chatelier's principle, shifting the equilibrium to the right to counteract the increased concentration of H₂.
Step 3
Evaluate the provided graphs
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Graph B accurately shows the increase in concentration of H₂ after it is added, while the concentration of CH₄ decreases slightly due to the shift in equilibrium towards the products. In contrast, Graph A does not represent this correctly.
Step 4
Select the correct graph
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Therefore, the correct choice representing the changes in the amounts of CH₄ and H₂ in the reaction mixture is Graph B.
