Comments on: O Level Chemistry: Particulate Nature of Matter / Kinetic Particle Theory 2

By: sean

sean — Wed, 05 May 2010 15:34:12 +0000

Hi Jennifer,

Good Attempt.

I agree with your answer for Quick Check 1.

Refer to above answer for Quick Check 2.

Keep Learning,

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author

By: sean

sean — Wed, 05 May 2010 15:33:04 +0000

Hi Kerk Yan Juin,

Good attempt.

Quick Check 1:

Solids indeed have fixed volume and i agree with your explanations.

But what about Liquids? Do they have fixed volume? Think about it?

Quick Check 2:

Well Done. Space saving to pack more in the cylinder is indeed the explanation for it.

Keep Learning,

To Your Academic Success in Chemistry,
Sean Chua
Master Trainer & Author

By: nwagbogun jennifer

nwagbogun jennifer — Sun, 21 Feb 2010 07:50:37 +0000

[1] liquid have fixed volumes because they cannot move about their fixed points and are not compressible [2] butane is stored in cylinders so that their will not be any oulet for gas to move out becuase they move randomly

By: Kerk Yan Juin

Kerk Yan Juin — Sun, 07 Feb 2010 07:38:03 +0000

Quick Check 1:

Which of them has a fixed volume? Solids, Liquids or Gases? Explain your choices with respect to how their particles are being arranged. (2 marks)

Solids have fixed volume. The force of attraction of the particles in the solids are very strong and they are closely packed until they can only vibrate in their fixed position.

Quick Check 2:

Many of Singapore homes as well as eateries and coffee shops are having cylinders in their premises known as LPG (Liquefied Petroleum Gas).

Suggest why large amounts of butane gas, used for cooking, are stored in liquid in cylinders. (1 mark)

When a gas is being compressed, the particles will be closer and thus form liquid under a high pressure. As we can see, a large amount of petroleum gas compressed into a cylinder is definitely saving the spaces and easier to be used.