The heat capacity of a milk cooker is 450 JK -1 . Calculate the rise in the temperature when it absorbs 9000 J of heat.

Given,

• Heat capacity (C) = 450 J K^-1
• Heat absorbed (Q) = 9000 J

Let, rise in temperature be 'ΔT'.

As,

Q = C × ΔT

$\Rightarrow \text {ΔT} = \frac{\text Q}{\text C} = \frac {9000}{450} = 20\ \text K$

Hence, rise in the temperature is 20 K or 20 °C.