Chemistry Class 11 NCERT Solutions: Chapter 5 States of Matter Part 3

Download PDF of This Page (Size: 299K)

Q: 7. What will be the pressure exerted by mixture of 3.2 g of methane and 4.4 g of carbon dioxide contained in a 9 flask at ?

Answer:

It is known that,

For methane

For carbon dioxide ( ),

Total pressure exerted by the mixture can be obtained as:

Hence, the total pressure exerted by the mixture is

Q: 8. What will be the pressure of the gaseous mixture when at 0.8 bar and 2.0 L of Dioxygen at 0.7 bar are introduced in a 1L vessel at ?

Answer:

Let the partial pressure of vessel be .

Now,

It is known that,

Now, let the partial pressure of in the vessel be

Now,

Total pressure of the gas mixture in the vessel can be obtained as:

Hence, the total pressure of the gaseous mixture in the vessel is 1.8 bar

Q: 9. Density of a gas is found to be bar pressure. What will be its density at STP?

Answer:

Given,

The density ( ) of the gas at STP can be calculated using the equation,

Hence, the density of the gas at STP will be .