Question

Hot water cools down after sometime it lives give reason

Answer 1

Answer:

hot water cools down as hot vapour rises up and the surrounding air occupies and makes the water cool

Answer 2

Answer: To attain thermal equilibrium with sorrounding

Explanation: When hot water placed in a vessel/system(is an open system) it will have more temperature than atmospheric temperature so to attain equilibrium the heat will move from the system to sorrounding.