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[Avatar] thermodynamics in bending?

How do water benders make ice instantly or fire benders making lighting?
gpt
Any conservation-of-energy problems in the Avatarverse can be easily explained by remembering that it has an exotic form of energy: namely, the chi of living beings and spirits. All bending is based around the redistribution of existing energy in the form of chi. Firebending does so directly in the form of converting the chi into heat, but an expert firebender can also turn it into static electricity, creating lightning. In the case of waterbending, forming ice is a similar process of converting the thermal energy of the water into chi.