Energy to Heat 1 kg Iron by 100°C
Raising 1 kg of iron (c = 450 J/kg·K) by 100°C requires 45 000 J.
How to use this tool
- Enter mass, specific heat capacity and temperature change δt in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your heat energy q and the full breakdown beneath it.
Iron has roughly one-tenth the heat capacity of water per kilogram, so it heats up quickly in a forge or fire.
Frequently asked questions
- What are common specific heat values?
- Water: 4186 J/kg·K (very high — why it's used as a coolant), iron: 450, aluminium: 900, copper: 385, ethanol: 2440 J/kg·K.
- Is ΔT in Celsius or Kelvin?
- Either, since a change of 1 °C equals a change of 1 K. Always use the magnitude of the change.