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The energy required to raise the temperature of an iron ball by \(1\ K\) is \(500\ JK^{-1}\). Calculate the amount of energy required to raise its temperature by \(20\ K\).
 
From the given data,
 
Heat Capacity (\(C'\)) \(=\) \(500\ JK^{-1}\)
 
Change in temperature (\(\Delta T\)) \(=\) \(20\ K\)
 
Formula to calculate Amount of heat energy required is,
 
 
Substitute the values,
 
Amount of heat energy required \(=\)