Topic VI: Physical Behavior of Matter

Which group contains only substances?

• KBr(aq), NaBr(aq), HBr(g), LiBr(s)

• KBr(s), NaBr(l), HBr(g), LiBr(s)

• KBr(aq), NaBr(aq), HBr(aq), LiBr(aq)

• KBr(aq), NaBr(aq), HBr(aq), LiBr(s)

Which formula represents a mixture?

• KCl (s)

• KCl (l)

• KCl (g)

• KCl (aq)

The separation of petroleum into its components based on their boiling point is accomplished by

• chromatography

• filtration

• fractional distillation

• cracking

Which best describes this reaction: Cl₂ + 242 J → Cl + Cl

• a bond is broken and the reaction is endothermic

• a bond is broken and the reaction is exothermic

• a bond is formed and the reaction is endothermic

• a bond is formed and the reaction is exothermic

Which phase change is endothermic?

• gas to solid

• liquid to solid

• gas to liquid

• solid to liquid

What Kelvin temperature is equal to -53°C?

• 306 K

• 220 K

• -53 K

• 53 K

At standard pressure, which substance will sublime when heated?

• CH₄ (g)

• HCl (l)

• KBr (aq)

• CO₂ (s)

How many Joules of heat energy is needed to melt 50.0 g of ice at 0 ºC?

• 113 000 J/g

• 334 J/g

• 16 700 J/g

• 2260 J/g

According to Reference Table H, water will boil at a temperature of 60 ºC when the pressure on the surface is closest to

• 19 kPa

• 25 kPa

• 10 kPa

• 50 kPa

What is the vapor pressure ethanol at 50 °C?

• 20 kPa

• 39 kPa

• 109 kPa

• 29 kPa