1) The standard Gibbs energy change at 300K for the reaction, 2A⇌B+C is 2494.2 J. At a given time , the composition of the reaction mixture is [A]=12 , [B]=2 and [C]=12 . The reaction proceeds in the [ R=8.314 JK/mol, e=2.718] A) forward direction because Q > Kc B) reverse direction because Q >Kc C) forward direction because Q < Kc D) reverse direction because Q < Kc Answer: Option BExplanation: Given, △G0=2494.2J Q=[B][C][A]2=2×12(12)2=4 ∴ △G=△G0+RTlnQ =2494.2+8.314×300ln4 =28747.27 J = Positive value Also, we have △G=RTlnQK If △G is positive , Q>K. Therefore, reaction shifts in reverse direction.