Heat
Main article: Heat
Fires give off heat, or the process of energy transfer from one body or system due to thermal contact.
Typical temperatures of fires and flames
- Oxyhydrogen flame: 2000 °C or above (3600 °F)[7]
- Bunsen burner flame: 1,300 to 1,600 °C (2,400 to 2,900 °F)[8]
- Blowtorch flame: 1,300 °C (2,400 °F)[9]
- Candle flame: 1,000 °C (1,800 °F)
- Smoldering cigarette:
- Temperature without drawing: side of the lit portion; 400 °C (750 °F); middle of the lit portion: 585 °C (1,100 °F)
- Temperature during drawing: middle of the lit portion: 700 °C (1,300 °F)
- Always hotter in the middle.
Temperatures of flames by appearance
The temperature of flames with carbon particles emitting light can be assessed by their color:[10]
- Red
- Just visible: 525 °C (980 °F)
- Dull: 700 °C (1,300 °F)
- Cherry, dull: 800 °C (1,500 °F)
- Cherry, full: 900 °C (1,700 °F)
- Cherry, clear: 1,000 °C (1,800 °F)
- Orange
- Deep: 1,100 °C (2,000 °F)
- Clear: 1,200 °C (2,200 °F)
- White
- Whitish: 1,300 °C (2,400 °F)
- Bright: 1,400 °C (2,600 °F)
- Dazzling: 1,500 °C (2,700 °F)
