What is SPECIFIC HEAT CAPACITY?

The quantity of heat which unit mass of a substance requires to raise its temperature by one degree. Abbrev she. This definition is true for any system of units, including SI, but whereas in all earlier systems a unit of heat was defined by putting the she of water equal to unity, SI employs a single unit, the joule, for all forms of energy including heat, which makes the she of water 4-1868 kj kg 1 K~1. Gases have two values of specific heat capacity; cr, the she when the gas is heated and allowed to expand against a constant pressure, and cvt the she when the gas is heated while enclosed within a constant volume. See mechanical equivalent of heat,


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