Extensive vs Intensive Properties Quiz
Questions: 16 · 10 minutes
1. A thermal property is measured in joules per kelvin (J/K) and increases when the amount of a substance increases. Which property is it?
Thermal conductivity
Temperature
Specific heat capacity
Heat capacity
2. Which of these is an intensive property of a uniform substance?
Density
Mass
Volume
Total internal energy
3. A homogeneous sample’s mass and volume are both multiplied by three while its composition and conditions stay the same. What happens to its density, calculated as mass divided by volume?
It triples.
It becomes one-third as large.
It remains unchanged.
It becomes nine times as large.
4. A uniform rectangular solid is cut into two equal pieces. What happens to the volume of each piece?
It becomes half of the original volume.
It doubles because cutting creates additional surface area.
It stays equal to the original volume because the material is unchanged.
It changes only if the material’s density changes.
5. Which property of a uniform solution is intensive?
Total volume of solution
Amount of solute
Total mass of solution
Solute concentration
6. Which quantity is not intensive?
Temperature
Amount of substance in moles
Molar mass
Pressure in an equilibrium system
7. A uniform liquid sample at equilibrium is divided into two equal portions without changing the surrounding conditions. What happens to the temperature of each portion?
It falls to half the original temperature.
It remains equal to the original temperature.
It doubles because there are now two portions.
It changes in proportion to each portion’s volume.
8. Which quantity is normally classified as extensive?
Density
Surface tension
Refractive index
Total internal energy
9. A system is scaled so that both its total energy and mass double. What happens to its specific energy, defined as total energy divided by mass?
It remains unchanged because numerator and denominator scale together.
It falls to half because the larger mass dilutes the energy.
It doubles because total energy is extensive.
It cannot be predicted even when energy and mass change proportionally.
10. Which statement best defines an extensive property?
It depends on the amount or size of the system being measured.
It remains unchanged whenever more material is added.
It describes only the chemical identity of a substance.
It can be measured only when a system is at equilibrium.
11. Two solid copper blocks have different sizes but are at the same temperature and pressure. Which comparison is correct?
Their masses and densities must both be equal.
The larger block must have a greater density.
The smaller block must have a lower density because it contains less copper.
Their masses can differ, but their densities are the same.
12. For a pure liquid measured at a specified external pressure, which property is intensive?
Total enthalpy
Boiling temperature
Volume
Mass
13. Which electrical quantity is extensive because contributions from separate parts of a system can be added?
Electric potential at a point
Electric field strength at a point
Total electric charge
Charge density
14. A pure solid sample is broken into smaller pieces. Assuming its purity and pressure remain unchanged, what happens to its melting point?
It increases because smaller pieces heat more quickly.
It remains the same.
It decreases in direct proportion to the mass.
It cannot be compared unless all pieces have the same shape.
15. Two equal samples of the same liquid, initially at the same temperature and pressure, are combined without loss of material. Which property doubles?
Density
Temperature
Mass
Specific heat capacity
16. Two containers hold the same ideal gas at the same temperature and pressure. One container has twice the volume of the other. Which quantity is twice as large in the bigger container?
Gas density
Molar mass
Amount of gas in moles
Temperature