Question

How does dry ice shrink in size

Answer 1

Sublimation takes place when an element or compound changes directly from a solid into a gas without passing through the liquid state....

this is what i found i do not know much about dry ice but i hope this helps you!!!
http://askville.amazon.com/ice-unused-freezer-shrink-time/AnswerViewer.do?requestId=2377877
this is the website i found this little information from i hope this helps you out

Answer 2

Dry ice, or solid carbon dioxide, sublimates under our normal sea level temperature and pressure, (due to some rather complicated triple point pressure curves and temperature curves and stuff) so as it sublimates, it loses mass.