Question
Write the formula for specific heat. Hence, obtain its unit.
✓
Answer
Specific heat of a substance,
c =Qm(Tf−Ti) , where m is the mass of the substance and Q is the amount of heat supplied to the substance to increase its temperature from Ti to Tf.
The SI unit of heat is the joule (J), that of mass is kg and that of temperature is kelvin (K).
∴ The SI unit of specific heat =J(kg⋅K)
[Note: Specific heat is also expressed in J/(kg°C) and cal/(g°C).]
c =
The SI unit of heat is the joule (J), that of mass is kg and that of temperature is kelvin (K).
∴ The SI unit of specific heat =
[Note: Specific heat is also expressed in J/(kg°C) and cal/(g°C).]
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