Chemical Thermodynamics Question 356

Question: Standard Gibb’s free energy change for isomerization reaction cis-2-pentene $ \rightarrow $ trans-2-pentene is $ -3.67kJ/mol $ at 400 K. If more trans-2-pentene is added to the reaction vessel, then

Options:

A) more cis-2-pentene is formed

B) equilibrium remains unaffected

C) additional trans-2-pentene is formed

D) equilibrium is shifted in forward direction

Show Answer

Answer:

Correct Answer: A

Solution:

  • If more trans-2-pentene is added, then its concentration in right hand side will increase. But in order to maintain the K constant, concentration of cis-2-pentene will also increase. Therefore more cis-2- pentene will be formed.


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