Which outcome occurs when a refrigerant's pressure in an air conditioning system rapidly decreases?

💡 Explanation

When refrigerant pressure rapidly decreases through expansion, adiabatic cooling occurs because of the Joule-Thomson effect, causing the temperature to drop below freezing at the valve, leading to ice formation. Therefore icing of the valve results, rather than motor overheating, efficiency increase or corrosion which involve different thermodynamic processes.

• Which outcome limits the yield when synthesizing ammonia at standard pressure?
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