Chemistry

a sample of an ionic compound is dissolved in water and the water gets colder. what is acting as the system?what is acting as the surroundings? does the heat flow from the system to the surroundings or from the surroundings to the system? is this extothermic or endothermic?what is the enthalpy sign for this process?

is the system the water or the salt? is the surrounding the calorimeter or whatever its stored in? would the heat flow from the system and would it be exothermic because its getting colder so heat would be leaving ?

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