Machines used for making snow at ski areas blow a mixture of compressed air and water through a nozzle. The temperature of the mixture may initially be well above the freezing temperature of water, yet crystals of snow are formed as the mixture is ejected from the nozzle. Explain how this happens.
To Explain: The formation of crystals of snow as mixture is ejected from the nozzle used in making snow at ski areas.
Explanation of Solution
Introduction:
The compressed air expands with cooling.
The nozzle used in making ice provides a lot of pressure on the air. This compressed air is released from the nozzle and splits into tiny droplets. The pressure in nozzle is higher than the pressure outside. This sudden change in pressure makes change in the heat of the system. This rapidly cools the water droplets and form small ice pellets or ice crystals.
Conclusion:
The compressed air is released that expands and cools rapidly due to loss of pressure. This rapid cooling allows the formation of ice crystals.
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