Question

A cylinder contains nitrogen gas. A piston compresses the gas

to half its initial volume. Afterward,

a. Has the mass density of the gas changed? If so, by what factor?

If not, why not?

b. Has the number of moles of gas changed? If so, by what factor?

If not, why not?

Short answer

(a) The density goes twice of its initial

(b) The number of moles doesn't change.

Step-by-step solution

Mass Density

To describe a macroscopic system, the state variables are used to describe the state of the system. One of the state variables is the density$Þ$