Problem: The normal freezing point of ammonia is -78°C. Predict the signs of ∆H, ∆S, and ∆G for ammonia when it freezes at -80°C and 1 atm: NH3(l) → NH 3(s) 

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The normal freezing point of ammonia is -78°C. Predict the signs of ∆H, ∆S, and ∆G for ammonia when it freezes at -80°C and 1 atm: NH3(l) → NH 3(s) 

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Based on our data, we think this problem is relevant for Professor Collins' class at CSUN.