During a phase change of a fixed mass of a substance, the average distance between neighboring particles increases by a factor of approximately 10. Which state change has occurred, and how does the density of the substance change?
Condensation; the density increases by a factor of approximately 101010
Melting; the density decreases by a factor of approximately 100010001000
Boiling; the density decreases by a factor of approximately 100010001000
Sublimation; the density increases by a factor of approximately 100010001000