I am studying physical and chemical changes right now and in my book it says that chemical reaction involve bond making and bond breaking and that in physical reaction there is no bond breaking/making ... but change of state of water involves breaking of hydrogen bonds, then how is it a physical change?

Question

Chemistry

Gillespie

11 April, 16:15

I am studying physical and chemical changes right now and in my book it says that chemical reaction involve bond making and bond breaking and that in physical reaction there is no bond breaking/making ... but change of state of water involves breaking of hydrogen bonds, then how is it a physical change?

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Answers (1)

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Zechariah Fitzgerald · Answer 1

Hydrogen bonds are electrostatic bonds between the hydrogen (+) and oxygen (-) due to H2O's polar compound. The hydrogen bonds are responsible for water's property of surface tension. So it's not really a chemical bond and therefore the change is physical. This scared me out too.

Also, I believe freezing the water does not break the hydrogen bond but boiling will break the hydrogen bond.