CHEM 1011 MIDTERM FINAL PAPER 2026 STUDY
GUIDE DETAILED ANSWERS READY
◉ Which of the following exhibits hydrogen bonding?
-CH3OH
-HCl
-CH2O
-HCN.
Answer: CH3OH
◉ An adhesive force:
-is the result of the intermolecular forces that attract identical
molecules
-is the result of the intermolecular forces that attract different
molecules together
-is the result of covalent interactions between atoms in a molecule
-is always stronger than a cohesive force.
Answer: is the result of the intermolecular forces that attract
different molecules together
◉ A liquid in a tube will form a concave meniscus when:
,-the adhesive forces are stronger than the cohesive forces
-the cohesive forces are stronger than the adhesive forces
-the adhesive forces are equal to the cohesive forces
-it's impossible to predict.
Answer: the adhesive forces are stronger than the cohesive forces
◉ ΔHvap is:
-the energy change when a substance changes from the liquid phase
to the gas phase
-the energy change when a substance changes from the solid phase
to the liquid phase
-the energy change when a substance changes from the liquid phase
to the solid phase
-the energy change when a substance changes from the solid phase
directly to the gas phase.
Answer: the energy change when a substance changes from the
liquid phase to the gas phase
◉ The correct expression to calculate the heat required to convert
100 g of ice starting at -12 °C to liquid water at a final temperature
of 85 °C is:
, -(m x c x ΔT)ice + (n x ΔHfus) + (m x c x ΔT)water
-(n x ΔHfus) + (m x c x ΔT)water
-(m x c x ΔT)ice + (m x c x ΔT)water
-(n x ΔHfus).
Answer: (m x c x ΔT)ice + (n x ΔHfus) + (m x c x ΔT)water
◉ In a phase diagram, the critical temperature represents:
-the temperature and pressure when gas, liquid, and solid phases
coexist
-the maximum temperature that a liquid can exist, regardless of
pressure
-the maximum pressure that a gas can exist, regardless of
temperature
-the minimum pressure that a solid can exist, regardless of
temperature.
Answer: -the maximum pressure that a gas can exist, regardless of
temperature
◉ Determine state of CO2 at 400*C and 300 atm (pic on next page).
Answer: Supercritical fluid (SCF)
◉ Metallic solids:
GUIDE DETAILED ANSWERS READY
◉ Which of the following exhibits hydrogen bonding?
-CH3OH
-HCl
-CH2O
-HCN.
Answer: CH3OH
◉ An adhesive force:
-is the result of the intermolecular forces that attract identical
molecules
-is the result of the intermolecular forces that attract different
molecules together
-is the result of covalent interactions between atoms in a molecule
-is always stronger than a cohesive force.
Answer: is the result of the intermolecular forces that attract
different molecules together
◉ A liquid in a tube will form a concave meniscus when:
,-the adhesive forces are stronger than the cohesive forces
-the cohesive forces are stronger than the adhesive forces
-the adhesive forces are equal to the cohesive forces
-it's impossible to predict.
Answer: the adhesive forces are stronger than the cohesive forces
◉ ΔHvap is:
-the energy change when a substance changes from the liquid phase
to the gas phase
-the energy change when a substance changes from the solid phase
to the liquid phase
-the energy change when a substance changes from the liquid phase
to the solid phase
-the energy change when a substance changes from the solid phase
directly to the gas phase.
Answer: the energy change when a substance changes from the
liquid phase to the gas phase
◉ The correct expression to calculate the heat required to convert
100 g of ice starting at -12 °C to liquid water at a final temperature
of 85 °C is:
, -(m x c x ΔT)ice + (n x ΔHfus) + (m x c x ΔT)water
-(n x ΔHfus) + (m x c x ΔT)water
-(m x c x ΔT)ice + (m x c x ΔT)water
-(n x ΔHfus).
Answer: (m x c x ΔT)ice + (n x ΔHfus) + (m x c x ΔT)water
◉ In a phase diagram, the critical temperature represents:
-the temperature and pressure when gas, liquid, and solid phases
coexist
-the maximum temperature that a liquid can exist, regardless of
pressure
-the maximum pressure that a gas can exist, regardless of
temperature
-the minimum pressure that a solid can exist, regardless of
temperature.
Answer: -the maximum pressure that a gas can exist, regardless of
temperature
◉ Determine state of CO2 at 400*C and 300 atm (pic on next page).
Answer: Supercritical fluid (SCF)
◉ Metallic solids:
