Specific heat of water is 4.184 J/g°C. Full data table with Cp and Cv values across temperatures. Includes formula, definition, and why it matters. Water has a specific heat capacity of around 4.2 J/g°C. As a result, raising 1 gram of water by 1°C requires 4.2 joules of energy. The heat required to increase the temperature of a particular substance's unit mass by a certain quantity is referred to as its specific heat capacity. Specific heat capacity is a thermodynamic property that indicates the energy a substance needs to heat up or cool down. Analysis of the formula and values such as water . Specific heat of water refers to the amount of heat energy required to raise the temperature of one gram of water by one degree Celsius (1°C). This important concept is widely used in heat capacity studies, calorimetry experiments, and thermodynamic calculations.