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Quizzes > Science > Chemistry

Test Your Chemistry Skills with the Intensive vs Extensive Properties Quiz

Ready to distinguish intensive and extensive properties? Dive in and ace every question!

Difficulty: Moderate
2-5mins
Learning OutcomesCheat Sheet
Paper art chemistry quiz with beaker scale molecule on coral background representing intensive vs extensive properties

This Intensive vs Extensive Properties Quiz helps you tell which traits change with sample size and which stay the same. Practice with clear examples (mass, volume, density, temperature) so you can check gaps before a test and build confidence. Want a quick refresh first? Read the short guide or try the properties of matter quiz .

Which of the following properties depends on the amount of substance present?
Color
Density
Mass
Boiling point
Mass is an extensive property because it scales directly with the amount of substance present. In contrast, density, boiling point, and color are intensive properties and remain constant regardless of quantity. Extensive properties such as mass and volume double when the substance is doubled.
What defines an intensive property of a substance?
It is independent of the amount of substance
It depends on the system's total mass
It is always additive
It changes when the size of the system changes
An intensive property does not depend on the amount of substance or system size. Common intensive properties include temperature, density, and pressure. They remain the same whether you have a small sample or a large sample of the material.
Which of the following is an extensive property?
Density
Temperature
Pressure
Volume
Volume is an extensive property because it depends on how much material is present. Pressure, density, and temperature are intensive properties that remain unchanged when the amount of substance changes. Extensive properties add when subsystems are combined.
Which of the following is an intensive property?
Density
Volume
Mass
Enthalpy
Density is an intensive property because it is independent of the amount of substance present. Mass, volume, and enthalpy are extensive properties and will change when the system size changes. Density remains constant for a substance under fixed conditions.
Which property remains the same for any sample size of a pure substance?
Volume
Total energy
Mass
Melting point
Melting point is an intensive property because it does not change with the amount of substance. Mass, volume, and total internal energy are extensive properties and will vary as sample size changes. Intensive properties are characteristic of the material itself.
If you cut a piece of copper into two equal parts, which property of each part remains unchanged?
Volume
Mass
Electrical resistivity
Total internal energy
Electrical resistivity is an intensive property intrinsic to the material and does not change when the size or amount is altered. Mass, volume, and total internal energy are extensive and will be halved if the piece is halved.
Total internal energy of a system is classified as which type of property?
Neither intensive nor extensive
Extensive
Intensive
Both intensive and extensive
Total internal energy is extensive because it depends on the size and amount of the system. Doubling the system doubles its internal energy. Intensive properties remain constant regardless of system size.
Specific heat capacity is considered which type of property?
Neither
Extensive
Intensive
Additive
Specific heat capacity is an intensive property because it is defined per unit mass and does not depend on the total amount of substance. Extensive properties change with system size whereas intensive properties like specific heat remain constant.
When the amount of an ideal gas is doubled at constant pressure and temperature, which property doubles?
Volume
Pressure
Temperature
Density
Under constant pressure and temperature, the ideal gas law (PV = nRT) shows that volume is directly proportional to amount (n). Doubling n doubles the volume, an extensive property. Pressure and temperature are held constant, and density stays the same.
Which type of property cannot uniquely identify a substance because it changes with sample size?
Intensive
Extensive
Path function
State function
Extensive properties depend on the sample size and cannot uniquely identify a substance because their values change with the amount of material. Intensive properties remain constant and help identify substances. State and path functions refer to thermodynamic definitions, not directly to size dependence.
Partial molar volume of a component in a mixture is classified as which type of property?
Additive
Extensive
Neither
Intensive
Partial molar volume is an intensive property because it is defined as the change in total volume per mole of a component added, independent of system size. It's a derivative of an extensive property but itself does not scale with system size.
Which of the following properties is additive when two systems are combined?
Density
Temperature
Internal energy
Pressure
Internal energy is an extensive property and therefore additive when two systems are combined. Density, pressure, and temperature are intensive and remain unchanged by simply combining samples without other changes.
Which property changes value when the system is uniformly scaled in size?
Refractive index
Density
Enthalpy
Melting point
Enthalpy is an extensive property that scales with system size, so uniform scaling changes its value. Melting point, refractive index, and density are intensive and remain constant when the system is uniformly scaled.
Which expression always represents an extensive property?
Density / Volume
Temperature / Volume
Density × Volume
Temperature × Volume
Density (intensive) multiplied by volume (extensive) yields mass, which is extensive. Dividing by volume or combining with temperature does not guarantee an extensive result. The product of an intensive and extensive property is always extensive.
Which thermodynamic potential is an intensive property?
Chemical potential
Enthalpy
Gibbs free energy
Entropy
Chemical potential is an intensive property, defined as the change in Gibbs free energy per mole of component added under constant temperature and pressure. Entropy, enthalpy, and Gibbs free energy are extensive and scale with system size. Intensive properties describe how potentials change per unit amount.
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Study Outcomes

  1. Understand intensive and extensive properties -

    Learn the fundamental definitions of what are extensive and intensive properties and how they relate to sample size dependence.

  2. Differentiate intensive vs extensive properties -

    Recognize the key differences between an intensive property and extensive property by comparing characteristics like temperature versus mass.

  3. Classify common property examples -

    Identify whether specific properties such as density, volume, or mass are intensive or extensive in various chemical contexts.

  4. Apply classification criteria -

    Use established guidelines to determine whether mass is intensive or extensive and solidify your understanding through quiz questions.

  5. Evaluate real-world scenarios -

    Test your ability to analyze and categorize properties in practical situations, mastering intensive and extensive distinctions.

Cheat Sheet

  1. Core Definitions: Intensive vs Extensive Properties -

    Intensive and extensive properties are fundamental in chemistry classification - intensive properties (like temperature) remain constant regardless of sample size, whereas extensive properties (like volume) scale with the amount of substance. According to IUPAC, this distinction helps predict how a system's characteristics change when you combine or divide samples. Mastering these definitions sets the stage for all deeper explorations of material behavior.

  2. Extensive Properties and Additivity -

    Extensive properties, such as mass (m) and volume (V), double when you combine two identical samples because they're additive: m_total = m1 + m2. University-level labs use this additivity to calibrate instruments by measuring known quantities. Remember that any property you can "add up" across samples is likely extensive.

  3. Intensive Properties and Sample-Size Independence -

    Intensive properties, like density (ϝ = m/V) or boiling point, remain unchanged when you change the amount of substance. This makes them ideal for identifying substances: pure water's boiling point is always 100 °C at 1 atm, whether you have a cup or a barrel. Use this insight when distinguishing intensive property and extensive property in mixtures.

  4. Mass vs Density: Is Mass Intensive or Extensive? -

    A common quiz question asks "is mass intensive or extensive?" - mass is extensive because it depends on sample size, whereas density is intensive since it's a ratio independent of how much you have. In practice, chemists often measure mass to find density, linking these two concepts in one calculation. This concrete example helps cement the intensive vs extensive distinction in your mind.

  5. Mnemonic Tip: "INTENSIVE INSIDE, EXTENSIVE EXTENTS" -

    Remember that intensive properties describe what's "inside" (independent of amount) and extensive properties describe the "extent" of material (dependent on amount). For example, temperature stays "inside" no matter how much water you have, while volume spans the "extent" of the container. This playful phrase from educational resources like the Royal Society of Chemistry can boost recall on test day.

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