A refrigerant is a substance or mixture, usually a fluid, used in a heat pump and refrigeration cycle.In most cycles it undergoes phase transitions from a liquid to a gas and back again.Many working fluids have been used for such purposes. R-401A is a HCFC zeotropic blend of R-22, R-152a, and R-124. 2  It is designed as a replacement for R-12. 3  R-404A is a HFC nearly azeotropic  blend of 52 wt.% R-143a, 44 wt.% R-125, and 4 wt.% R-134a. 4  It is designed as a replacement of R-22 and R-502 CFC.
The temperature of the ice will continue to decrease until it reaches the same temperature as the outside air which is 20 F. Liquid water has more energy than frozen water. When water freezes it gives up some of the water's energy. This energy that is given up is the latent heat of freezing.
Â· just now. Report Abuse. Freezing(crystallization) of water is an exothermic reaction, since the particles in the solid phase has lower kinetic energy and potential energy. For more information, you can check graphs of the heating and cooling curves.Source(s): My knowledge of the heating and cooling curve. cld Â· 9 years ago.Thumbs up.1.reezing(crystallization) of water is an exothermic reaction, since the particles in the solid phase has lower kinetic energy and potential energy. For more information, you can check graphs of the heating and cooling curves. Source(s): My knowledge of the heating and cooling curve. cld Â· 9 years ago. Thumbs up. 1.