A water molecule gains enough energy to enter the gas phase. Is this a chemical or physical change? Why?

Question

matt20899 · Answer

Physical because you are not changing the substance. For example water vapor(gas) can be condensed back into water. If you burn a piece of paper the ash cannot be changed back into paper therefore it is chemical. But because you are not changing the substance the answer is physical.

Answered by matt20899 | 2024-06-10

desthermitcrab · Answer

It is a physical change becasue the chemical makeup of the water molecule did not change - the molecule just changed state. 
 Happy to help!

matt20899 · Answer

The evaporation of a water molecule into the gas phase is a physical change because it does not alter the chemical structure of water, which remains H₂O. This process is reversible, further indicating its nature as a physical change. Unlike a chemical change, no new substances are formed during evaporation. 
 ;

A water molecule gains enough energy to enter the gas phase. Is this a chemical or physical change? Why?

Answer (3)

Related Questions in Chemistry

📝 Answered - An organic chemist measures the temperature [tex]$T$[/tex] of a solution in a reaction flask. Here is the result: [tex]$T=32.394^{\circ} C$[/tex] Convert [tex]$T$[/tex] to SI units. Round your answer to 6 significant figures.

📝 Answered - Which of these changes is an example of a chemical change? A. sodium making an explosion when added to water B. solid CO₂ turning into gaseous CO₂ C. water droplets forming outside a glass on a hot day D. evaporation of water from a pan

📝 Answered - Why study chemistry? a) to be better informed about the world b) to be better able to make informed decisions c) to learn a technique for identifying and solving problems d) all of the above