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Post Reopened by gandalf61, Vincent Thacker, Michael Seifert
Post Closed as "Duplicate" by John Rennie, Matt Hanson, Jon Custer
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Qmechanic ♦
Qmechanic ♦
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Vincent Thacker
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why H2O vapor Why does $\rm{H_2 O}$ have 12 degreedegrees of freedom >?

I know there will be 3 translational D.O.F. and 3 rotational D.O.F., and Itit can have 4 vibrational D.O.F. 2(one potential and one kinetic) for each O-H Bond. butBut from where does 2 more D.O.F. come from? (II am also not sure about the 4 vibrational D.O.F that I talked about is. Is it really 4 or not well? Well, it should be but when I searched on internet regarding this it showed that 6 Vibrational D.O.F. in water vapor are asymmetric, symmetric, wagging, twisting, scissoring and rocking. I don't know the meaning of each term so please also explain that).

why H2O vapor have 12 degree of freedom >?

I know there will be 3 translational D.O.F. and 3 rotational D.O.F., and It can have 4 vibrational D.O.F. 2(one potential and one kinetic) for each O-H Bond. but from where does 2 more D.O.F. come from? (I am also not sure about the 4 vibrational D.O.F that I talked about is it really 4 or not well it should be but when I searched on internet regarding this it showed that 6 Vibrational D.O.F. in water vapor are asymmetric, symmetric, wagging, twisting, scissoring and rocking. I don't know the meaning of each term so please also explain that).

Why does $\rm{H_2 O}$ have 12 degrees of freedom?

I know there will be 3 translational D.O.F. and 3 rotational D.O.F., and it can have 4 vibrational D.O.F. (one potential and one kinetic) for each O-H Bond. But from where does 2 more D.O.F. come from? I am also not sure about the 4 vibrational D.O.F that I talked about. Is it really 4 or not? Well, it should be but when I searched on internet regarding this it showed that 6 Vibrational D.O.F. in water vapor are asymmetric, symmetric, wagging, twisting, scissoring and rocking. I don't know the meaning of each term so please also explain that.

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Ujjwal
Ujjwal
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why H2O vapor have 12 degree of freedom >?

I know there will be 3 translational D.O.F. and 3 rotational D.O.F., and It can have 4 vibrational D.O.F. 2(one potential and one kinetic) for each O-H Bond. but from where does 2 more D.O.F. come from? (I am also not sure about the 4 vibrational D.O.F that I talked about is it really 4 or not well it should be but when I searched on internet regarding this it showed that 6 Vibrational D.O.F. in water vapor are asymmetric, symmetric, wagging, twisting, scissoring and rocking. I don't know the meaning of each term so please also explain that).