A kilogram 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.
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.
