Properties of Pure Substances Quiz

What is a substance that has a fixed chemical composition throughout?

• Compound

• Pure Substance

• Element

• Mixture

How many principal phases can a pure substance exist in?

• Two

• Three

• Four

• Five

In which phase are the molecular bonds the strongest?

• Gas

• Plasma

• Liquid

• Solid

What is the point at which the liquid and vapor phases are not distinguishable?

• Boiling Point

• Critical Point

• Triple Point

• Saturation Point

What is the property defined as H = U + PV?

• Entropy

• Enthalpy

• Latent Heat

• Specific Heat

At what pressure does water vapor behave as an ideal gas?

• At 0.5 atm

• At 1 atm

• Below 1 atm

• Above 1 atm

What is the compressibility factor Z for an ideal gas?

• 0.5

• 2

• 1

• 1.5

What is the error percentage when using the ideal gas equation for R-134a at 1 MPa and 50°C?

• Between 10% and 15%

• Less than 5%

• Between 5% and 10%

• More than 15%

In which region does a gas behave as an ideal gas regardless of temperature?

• Critical Point Region

• Compressed Liquid Region

• Superheated Region

• Low Pressure Region

What is the molar mass of a substance defined as?

• Mass of one mole of a substance

• Volume of one mole of a substance

• Temperature of one mole of a substance

• Density of one mole of a substance