If you want "twice as hot" to be meaningful, you have to use an absolute scale, either Kelvin or Rankine. (1 K = 1.8 °R) Doubling absolute temperature doubles the pressure (at constant volume) or volume (at constant pressure) of an ideal gas. This gets really important when it comes to compressing and expanding air and other gasses. Room temperature is approximately 293 K, twice that is 586 K / 595 °F / 313 °C. Hotte…
Or cold? There is a big ball in our solar system sitting at tens of millions of degrees K, and you think 273 degrees is warm?