Question

I saw the following problem in a book:

In S.T.P., a balloon of diameter 1.004m has to be filled with H2 gas.At 27°C,a cylinder with volume 1 m³ is filled with H2 gas having 2000 kPa pressure.How many balloons can be filled with the gas in the cylinder?

The volume of the gas at S.T.P. in the cylinder comes out to be 17.962 m³.Now, it's written in the book that all of the gas can't be taken out,1m³ of volume of gas can't be taken out as it is the volume of the cylinder itself.

I have two questions.

1. How can the volume of the gas be greater than the volume of the cylinder at S.T.P.?Doesn't the gas contain the same amount of volume as the cylinder?

2. Why can't we take out all of the gas out of the cylinder?

Please consider that I am quite new to this platfrom and I don't know a lot about the rules or how to ask questions.Hope anyone can help.

Answer 1

The volume of the gas at S.T.P. is not the same as the volume of the cylinder. The volume of the gas refers to the space occupied by the hydrogen gas molecules, while the volume of the cylinder includes the space taken up by the gas as well as the physical dimensions of the cylinder itself.

The cylinder has a fixed volume that cannot be removed or changed when extracting the gas from it.

Step-by-step explanation:

1. How can the volume of the gas be greater than the volume of the cylinder at S.T.P.?

The volume of the gas at S.T.P. is not the same as the volume of the cylinder.

The volume of the gas refers to the space occupied by the hydrogen gas molecules, while the volume of the cylinder includes the space taken up by the gas as well as the physical dimensions of the cylinder itself.

2. Why can't we take out all of the gas out of the cylinder?

It is mentioned in the book that 1 m³ of the volume of gas cannot be taken out as it is the volume of the cylinder itself.

This means that the cylinder has a fixed volume that cannot be removed or changed when extracting the gas from it.