Question

$K_p$ for the reaction $A\left(g\right)+B\left(g\right)\rightleftharpoons 2C\left(g\right);$ is $0.5$ at $T=295K.$ If initially $P_A=1atm,$ $P_B=10atm$ and $P_c=5atm,$ then:

• A. $△G<0$
• B. $△U=T△S$
• C. $△G^0=0$
• D. $△G>0$

Answer 1

Answer: (D)

$△G>0$

$A\left(g\right)+B\left(g\right)\rightleftharpoons 2c\left(g\right)$

Initial$\left(P\right)$ $1atm$ $10atm$ $5atm$

Let $Q_p$ be the reaction quotient initially

$\therefore Q_p=\frac{{\left(5\right)}^2}{1\times 10}=\frac{25}{10}=2.5$

& $K_p=0.5$

Here, $K_p<Q_p$

$\therefore$ The value of $Q_p$ will tend to decreases to reach the value of $K_p$ & the reaction will proceed in reverse direction $\therefore △G>0$