Chem 162 Midterm 1 Exam with
Complete Solutions
Bond Order - ANSWER-(bonding + antibonding) / 2
paramagnetic - ANSWER-unpaired electron on M.O. diagram
diamagnetic - ANSWER-paired electron on M.O. diagram; no unpaired
Strong bond = short bond length - ANSWER-Weak bond = long bond length
Weak IMF - ANSWER--low boiling point b/c easy to break bonds
-low freezing point
-high volatility
-high vapor pressure
-low viscosity
-low surface tension
Strong IMF - ANSWER--high boiling point b/c hard to break bonds
-high freezing point
-low volatility
-low vapor pressure
-high viscosity
-high surface tension
volatility - ANSWER-easy of evaporation
vapor pressure - ANSWER-how much pressure in gas phase
viscosity - ANSWER-resistance to flow
Ionic Solid - ANSWER--metal + nonmetal
-ex: NaCl(s), CsCl(s), MgCl2(s)
-high melting points
-water dissolves the solid by forming hydration shells around its parts
molecular solid - ANSWER--nonmetal + nonmetal
-ex: S8(s), P4(s), CO2(s), P4O10(s)
-low melting points
-POLAR: molecules are held in solid state by hydrogen bonds
Complete Solutions
Bond Order - ANSWER-(bonding + antibonding) / 2
paramagnetic - ANSWER-unpaired electron on M.O. diagram
diamagnetic - ANSWER-paired electron on M.O. diagram; no unpaired
Strong bond = short bond length - ANSWER-Weak bond = long bond length
Weak IMF - ANSWER--low boiling point b/c easy to break bonds
-low freezing point
-high volatility
-high vapor pressure
-low viscosity
-low surface tension
Strong IMF - ANSWER--high boiling point b/c hard to break bonds
-high freezing point
-low volatility
-low vapor pressure
-high viscosity
-high surface tension
volatility - ANSWER-easy of evaporation
vapor pressure - ANSWER-how much pressure in gas phase
viscosity - ANSWER-resistance to flow
Ionic Solid - ANSWER--metal + nonmetal
-ex: NaCl(s), CsCl(s), MgCl2(s)
-high melting points
-water dissolves the solid by forming hydration shells around its parts
molecular solid - ANSWER--nonmetal + nonmetal
-ex: S8(s), P4(s), CO2(s), P4O10(s)
-low melting points
-POLAR: molecules are held in solid state by hydrogen bonds