Input interpretation
selenium | melting point
Result
221 °C (degrees Celsius) (value given for hexagonal, gray form)
Unit conversions
494 K (kelvins)
430 °F (degrees Fahrenheit)
889 °R (degrees Rankine)
177 °Ré (degrees Réaumur)
124 °Rø (degrees Rømer)
Comparisons as temperature
12 °C below autoignition temperature of book paper in Ray Bradbury's famous novel (451 °F)
25 °C below to 3 °C above autoignition temperature of paper (218 to 246 °C)
94 °C above hottest temperature of a Concorde nose tip (127 °C)
Corresponding quantities
Thermodynamic energy E from E = kT: | 43 meV (millielectronvolts)
Blackbody energy flux Φ from Φ = σT^4: | 3381 W/m^2 (watts per square meter)
Approximate luminous exitance from a planar blackbody radiator perpendicular to its surface: | 8.6×10^-10 lx (lux)
Thermodynamic properties
phase at STP | solid | melting point | gray selenium | 217 °C boiling point | gray selenium | 684.9 °C critical temperature | gray selenium | 1766 K critical pressure | gray selenium | 27.2 MPa molar heat of fusion | gray selenium | 6.69 kJ/mol molar heat of vaporization | gray selenium | 95.48 kJ/mol specific heat at STP | 321.2 J/(kg K) (rank: 37th) | (properties at standard conditions)
Nearest corresponding gas marks
| temperature | usage gas mark 7 | 220 °C | United Kingdom stufe 4 | 220 °C | Germany (actual measurements may vary)