What is Temperature?
How hot a gas is. Laplaxian calculates with absolute temperature, in kelvin (K).
Reaction rates, equilibrium compositions, density and heat capacity all depend strongly on temperature. In combustion, a difference of a few hundred kelvin can change the outcome completely.
Room temperature is about 20 °C, roughly 293 K. The hottest part of a gas-stove flame is above 2000 K.
Input fields accept K or °C, but every calculation and stored value uses K. Results show both K and °C.
Thermodynamic relations use absolute temperature. The conversion from the Celsius temperature t is:
T\,[\mathrm{K}] = t\,[{}^{\circ}\mathrm{C}] + 273.15
For an ideal gas, temperature links pressure P, density \rho and mean molecular weight \bar{W} (R: gas constant):
P = \frac{\rho R T}{\bar{W}}