Gases

What specific phase of matter has no fixed shape and volume?

• Solid

• Liquid

• Gas

• Plasma

Which example has particles that can be drawn closer to occupy smaller volume?

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When you open a can or bottle of soft drinks, it fizzes because of the escaping dissolved carbon dioxide due to change of __________.

• Pressure

• Volume

• Mass

• Temperature

Based on the Kinetic Molecular Theory, gases are composed of molecule. The following statements are TRUE regarding the molecules of gases, EXCEPT:

• The distances from one molecule to another molecule are far greater than the molecules’ dimension

• The molecules of gases are always in constant random motion

• The gas molecules have weak intermolecular forces in between them

• Temperature has small effect on the movement of gas molecules

Gases have the tendency to occupy all the spaces of the container that they are confined. The amount of space occupied by the gases is called ______.

• pressure

• volume

• temperature

• mass

Mika can still pump air in her purple balloon even though it is already inflated. What explains this phenomenon?

• balloon looks better if it is bigger

• balloon are slightly elastic

• the molecules of gas inside a balloon is highly compressible

• the gas molecules in a balloon have high pressure

If the pressure of gases inside a non-rigid tank doubles, what will happen to its volume?

• it will reduce by half

• it will double

• it will be the same as the amount of pressure

• it will triple

According to Charles Law, the temperature and volume of gas molecules are directly proportional to each other if the pressure and the number of moles of gases are held constant. Below are the real-life applications or examples of Charles Law, EXCEPT:

• hot air balloon

• breathing

• tire explosion during summer

• baking bread

Each container with varying volume has 1.0 mole of oxygen gas at 30.0°C. In which container will pressure be the lowest?

• A

• B

• C

• D

If temperature is held constant, what is the relationship between the pressure and volume of gases?

• directly proportional

• indirectly proportional

• inversely proportional