engineering

Specific Heat Capacity

The amount of heat energy required to raise the temperature of one unit mass of a substance by one degree.

Specific heat capacity (c) measures how much energy a substance can absorb per unit mass per degree temperature change. Units: J/(kg·K) or cal/(g·°C).

Formula

Q = mcΔT, where Q = heat energy (J), m = mass (kg), c = specific heat, ΔT = temperature change (K or °C).

Common Values (J/kg·K)

  • Water: 4,186 — highest of common materials
  • Aluminum: 897
  • Iron: 449
  • Copper: 385
  • Air: 1,005

Water's high specific heat is why coastal climates are milder than inland — oceans absorb/release heat slowly.

Related Calculators

Related Terms