Is the formation of carbonic acid exothermic or endothermic

Endothermic

Explanation:

When there is an increase in temperature, the solubility of carbon dioxide decreases which results in a lower concentration of carbonic acid (the formation of carbonic acid is from the reaction of CO2 with H2O which is exothermic, so the reverse reaction is favoured).

more heat increases the solubility of the gas=endothermic

they include patterns; cause and effect; scale, proportion, and quantity; systems and system models; energy and matter; structure and function; and stability and change.

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the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be