which one of the following does not involve a change? a. melting of wax b.expansion of...
which one of the following does not involve a change? a. melting of wax b.expansion of hot air in a balloon c. condensation of water vapor d. sublimation of dry ice
Homework Answers
a)
Melting is a change from solid to liquid
Its a physical change.
c)
Condensation is change from gas to liquid
Its a physical change.
d)
Sublimation is change from solid to gas.
Its a physical change.
b)
In expansion, there is no physical or chemical change. There is just increase in
volume.
Gas is still gas in the balloon.
Answer: b
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