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?