sublimation energy

sublimation energy

[‚səb·lə′mā·shən ¦en·ər·jē]
(thermodynamics)
The increase in internal energy when a unit mass, or 1 mole, of a solid is converted into a gas, at constant pressure and temperature.
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When it reaches the end of the tube and the expansion room, the CO, expands into a "snow and gas" mixture at around -79 C (-110 F), which has high cooling capacity due to the sublimation energy of the transition from solid CO, to gas.