Question

Thermal expansion of a gas causes a change in the ____ of the gas.

A. Radioactiveness
B. Density
C. Mass
D. Altitude

Answer 1

B. Density

Step-by-step explanation:

Thermal expansion of a gas will cause a definite change in the density of the gas.

It is product of an increase in the average kinetic energy of the system in which molecules are found.

• Gaseous thermal expansion will increase the volume in which gases occupy.
• Mass of the gas will still remain the same.
• Since density is the mass per unit volume, as the gases expand, their density reduces more and more.

Therefore, thermal expansion of gas will cause a change in the density of the gas.