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##### Asked by: Poncho Cabrejas

science physics# What is the unit of heat in CGS?

Last Updated: 28th May, 2020

**CGS**system,

**heat**is expressed in the

**unit**of calories which is further said to be the

**heat**energy needed to increase the

**temperature**of 1 gm of clean water by one degree Celsius. Sometimes kilocalorie (kcal) is also referred to as a

**unit of heat**where 1 kcal = 1000 cal.

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Regarding this, what is the CGS and SI unit of heat?

The **SI unit of heat** is the joule, the same as any other form of energy. Centimeter-gram-second has been replaced by MKS meter-kilogram-second but anyway **CGS unit** of measure for **heat** is 'erg' and **SI** is 'Kelvin'.

Furthermore, what is the CGS unit of thermal capacity? Thus, the specific **heat capacity** of a substance is defined as the amount of **heat** required to change the temperature of **unit** mass of substance through 1 degree. Its **unit** is Jkg^{-}^{1} k^{-}^{1}in SI-system and 1 cal gm^{-}^{1} C^{-}^{1} in **CGS** –system. Its **unit** is J k^{-}^{1} in SI-system and cal C^{-}^{1} in **CGS** –system.

Also question is, what is the unit of heat?

As a form of energy, **heat** has the **unit** joule (J) in the International System of **Units** (SI). However, in many applied fields in engineering the British **thermal unit** (BTU) and the calorie are often used. The standard **unit** for the rate of **heat** transferred is the watt (W), defined as one joule per second.

What is the SI unit of specific heat?

The **SI unit** for **specific heat** capacity is the joule per kilogram Kelvin, J?kg^{-}^{1}?K^{-}^{1} or J/(kg?K), which is the amount of energy required to raise the temperature of one kilogram of the substance by one Kelvin.