Question

I have reached the surface, but too quickly, so I had to use the dry decompression chamber. In the dry decompression chamber, I had some time to think and imagine. I really thought I saw small gas molecule floating around. Fill-in the postulates of the Kinetic Molecular Theory below.

The Postulates:

I.The total volume in which the gas is contained is mostly _____________ space. The ___________ of the gas is negligible.

II.Gas molecules are in continuous _____________ _____________ in all directions.

III.Energy is _____________ from one molecule to another, but the total energy remains _____________ at a constant temperature.

IV.Molecules of a gas neither_____________ or _____________ each other.

V.The average KE of gas particles depends only on the absolute _____________ of the gas

Now… Match each postulate them to the observational statements below by putting the corresponding Roman numeral in front of each statement

1) ______The gas molecules didn’t really seem interested in each other

2) ______They never seemed to lose energy, no matter how many times they bumped into each other

3) ______I couldn’t believe we could actually breathe, considering there seemed to be so few molecules.

4) ______They even seemed to move faster when they got nearer to me.

5)( ______The molecules seemed to have no rhyme or reason in their movements

Answer 1

I.The total volume in which the gas is contained is mostly EMPTY space. The VOLUME of the gas is negligible.

II.Gas molecules are in continuous RANDOM MOTION in all directions.

III.Energy is TRANSFERRED from one molecule to another, but the total energy remains CONSTANT at a constant temperature.

IV.Molecules of a gas neither ATTRACT or REPEL each other.

V.The average KE of gas particles depends only on the absolute TEMPERATURE of the gas.

1) IV : The gas molecules didn’t really seem interested in each other

2) III : They never seemed to lose energy, no matter how many times they bumped into each other

3) I   : I couldn’t believe we could actually breathe, considering there seemed to be so few molecules.

4) V :  They even seemed to move faster when they got nearer to me

5) II : The molecules seemed to have no rhyme or reason in their movements