[Single-digit Integer] A mixture of and in 2:1 mole ratio is used to prepare water vapour by the rea β States of Matter and Gaseous State Chemistry Question
Question
[Single-digit Integer] A mixture of $H_2$ and $O_2$ in 2:1 mole ratio is used to prepare water vapour by the reaction: 2$H_2$(g) + $O_2$(g) β 2$H_2O$(g). The total pressure of gases in the container is 4.5 atm at 57Β°C, before the reaction. The final total pressure of gases (in atm) at 127Β°C after reaction assuming 80% yield of water vapour is
![Chemistry diagram for: [Single-digit Integer] A mixture of and in 2:1 mole ratio is used to prepare water vapour by the reaction: 2(g) + (g) β](https://urywdhpqdpvmqzlenttu.supabase.co/storage/v1/object/public/question-images/nk/ch03_exII_Q9.png)
Answer: 0004
π‘ Solution & Explanation
$n_{H_2}=2, n_{O_2}=1$; total initial $=3$ mol at 330 K, 4.5 atm. $2H_2+O_2\to2H_2O$: all reacts, $n_{final}=2$ mol $H_2O(g)$ at 400 K. $P_f=P_i\times(n_f/n_i)\times(T_f/T_i)=4.5\times(2/3)\times(400/330)\approx4$ atm. Answer: $\boxed{4}$
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