Answer:
option (c)
Step-by-step explanation:
Specific heat capacity of a substance is defined as the amount of heat required to raise the temperature of substance of mass 1 kg by 1°C.
Its SI unit is J/kg°C.
Heat capacity is defined as the amount of heat required to raise the temperature of substance by 1°C.
Its SI unit is J/°C
The relation between the specific heat capacity and the heat capacity is
specific heat capacity = heat capacity x mass
So, the specific heat of coffee mug = 240 x 0.25 = 60 J/kg°C
Thus, option (c) is correct.