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QUIZFEBRUARY 13, 2015
QUIZ• YOU ARE SEATED AND SILENT• DEDUCTION OF 10 POINTS FOR
TALKING DURING THE QUIZ• REMAIN SILENT EVEN IF YOU
ARE FINISHED WITH THE QUIZ
AIM PROMPT
• It is 20°F and ice has formed on the road. What is the most likely product that may be employed to deice the road?
•Q1: What does salt do to the freezing point of water?
•Q2: Why is the salt used in deicing the road, is not really effective below the temperature of 15°F?
•Q3: What substance is better than salt when the weather falls below 15°F?
•Q4: Why is CaCl is a better deicing agent than NaCl?
•Q5: What phase change(s) are occurring when the ice is at solid-liquid equilibrium?
•Q6: Why would ice remains in solid form even though some of the water molecules are melting?
•Q7: What type of bond exists in NaCl?
•Q8: Does NaCl interfere with melting?
AIM PROMPT
• It is 20°F and ice has formed on the road. What is the most likely product that may be employed to deice the road?