Akilogram of aluminum metal and a kilogram of water are each warmed to 75 ∘c and placed in two identical insulated containers. one hour later, the two containers are opened and the temperature of each substance is measured. the aluminum has cooled to 35 ∘c while the water has cooled only to 66 ∘c.

Explanation:

The difference is in the amount of heat required to increase their temperature by 1 °C

It takes 4.19 joules to increase the temperature of water by 1 °C compared to Aluminium which is 0.900 joules to raise the temperature by  1 °C. Consequently, Aluminum will cool easily compare to water which will retain some of it heat longer because it does not heat up quickly like Aluminum.

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