Answer to Question #138254 in General Chemistry for Cortland Johnson

Question

A 1.0 liter flask at 298 K contains 5000 Pa of nitrogen monoxide and 1000 Pa of oxygen.

These will react to form nitrogen dioxide. Use this information to find the pressure of each gas remaining after the reaction is complete and the temperature of the flask has changed to 300 K.

Answer 1

From gas equation PV=nRT

we can say that pressure is directly proportional to number of nodes

hence we can conclude that nitrogen monoxide is 5 times of oxygen

$NO+\frac12O_2\to NO_2$

since nitrogen monoxide is 5 times that of oxygen but oxygen consumed here will be half of the consumption of the nitrogen monoxide so

Here limiting will be oxygen here :

NO left = 5000-2000=3000 Pa

O₂ left =0 (limiting reagent)

NO₂ formed = 2000 Pa