Describe briefly an experiment to verify Newton’s law of cooling.
Describe briefly an experiment to verify Newton’s law of cooling.
Hot water in a calorimeter is placed near an open window. The temperature of the water is recorded at suitable time intervals. A graph of temperature against time is plotted. Slope of the graph is obtained at temperature θ1. More values of the slope are obtained at different temperatures, θ2, θ3, θ4 ………………
For each temperature, excess temperature, (θ -θR) is calculated, where θR is the room temperature.
A graph of slopes against excess temperature is plotted.
A straight line graph through the origin verifies Newton’s law.
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