Chapter 13, Question 12: Consider the following system at equilibrium where AH°-

Question

Chapter 13, Question 12:

Consider the following system at equilibrium where AH°--18.8 kJ, and Kc-10.5, at 350 K 2CH2C2(g)CH4(g) CCI4(g) If the VOLUME of the equilibrium system is suddenly increased at constant temperature: The value of KcA. increases. B. decreases. C. remains the same. The value of QcA. is greater than Kc B. is equal to Kc C. is less than Kc The reaction must:A. r run in the forward direction to reestablish equilibrium B. run in the reverse direction to reestablish equilibrium C. remain the same. It is already at equilibrium The number of moles of CCI4 will:A. increase. B. decrease. C. remain the same.

Explanation / Answer

1. Kc = c) remains same [ Kc is independent of volume]

Qc =  c) remains same [Qc is independent of volume ]

reaction must : B) run in reverse dirn to establish eqm/

CCl 4= A) increase [ no.of product molecule increase]

2.

Kc = c) remains same [ Kc is independent of volume]

Qc =  c) remains same [Qc  is independent of volume ]

reaction must : A) run in forward dirn to establish eqm/

CCl 4= B) Decrease [ no.of product molecule decrease]

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