Equilibrium Question 734
Question: One mole of $ N_2O_4(g) $ at 300 K is kept in closed container under one atmosphere. It is heated to 600 K when 20% by mass of $ N_2O_4(g) $ decomposes to $ NO_2(g) $ . The lresultant pressure is
Options:
A) 1.2 atm
B) 2.4 atm
C) 2.0 atm
D) 1.0 atm
Show Answer
Answer:
Correct Answer: B
Solution:
$ \begin{matrix} N_2O_2 & \rightarrow & 2NO_2 \\ 1 & {} & 0 \\ (1-0.2) & {} & 2\times 0.2=0.4 \\ \end{matrix} $ Total pressure =1.2 As the temperature is doubled, the pressure becomes double. Therefore, the total final pressure is $ 1.2\times 2=2.4atm. $
