It is said that when a gas is dissolved in water than the process is exothermic but when cl2 is - Science -

Question

It is said that when a gas is dissolved in water than the process
is exothermic but when cl2 is dissolved in water the process is
endothermic Pls explain in detail how is this possible?

Debalina Deb · Accepted Answer

Solution
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It is said that when a gas is dissolved in water than the process is exothermic but when cl2 is dissolved in water the process is endothermic. Pls explain in detail how is this possible?