# Equilibrium $\equiv$ Rate Of Forward $=$ Backward Reaction

Chemistry Level 3

$\large \ce{NH4COONH2_{~~(s)} \rightleftharpoons 2NH3_{~~(g)} + CO2_{~~(g)}}$

For the above reaction, $\ce{NH4COONH2}$ is placed in a closed vessel and equilibrium is attained. Let the total pressure of the system be $P_1$.

After the reaction attains equilibrium, some $\ce{NH3}$ is added to the system in such a way that after equilibrium is attained, $P_{\ce{NH3}}$ equals $P_1$. Let the total pressure of the system after equilibrium is attained again be $P_2$.

What is the ratio $\dfrac{P_2}{P_1}$ ?

Details:

• $P_\text{gas}$ represents the partial pressure of the gas.

• The temperature of the gas remains constant.

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