no. a phase change is ALWAYS a physical change in the substance.
Frozen carbon dioxide is still carbon dioxide, so it is a physical change.
chemical change
We inhale oxygen and exhale carbon dioxide as a result of a change in our bodies. Answer - Chemical Change
No. helium is released in outer air but does not lose or change its chemical formula
It is a change in physical state, which is a physical change.
It is a chemical change.
Chemical
This is a chemical change.
chemical because it is changing the state from solid to a gas in which is a chemical change
chemical
H2co3=co2+h2o
Yes, it is a chemical reaction.