hot metal in cold water

[joonkimdds]

when we put something in water and water temp decreases, we can say that the reaction stole heat from water and thus it's called endothermic.

If we put hot metal in cold water, heat lost by metal is equal to heat gained by water. In this case, is this endothermic or exothermic reaction?

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[hausee]

when we put something in water and water temp decreases, we can say that the reaction stole heat from water and thus it's called endothermic.

If we put hot metal in cold water, heat lost by metal is equal to heat gained by water. In this case, is this endothermic or exothermic reaction?

there is no reaction here, just heat transfer...

 

[redchesus]

there is no reaction here, just heat transfer...

yup! m1C1ΔT = -m2C2ΔT baby...

 

[jay47]

when we put something in water and water temp decreases, we can say that the reaction stole heat from water and thus it's called endothermic.

If we put hot metal in cold water, heat lost by metal is equal to heat gained by water. In this case, is this endothermic or exothermic reaction?

It is only endo/exothermic from ONE compound's perspective. It would be exothermic for the metal, and endothermic for the cold water, even though neither of these is a "reaction" so to speak.