UNE CHEM 1011 MIDTERM Latest Update 2026-
2027 Exam 130 Questions with 100% Verified Correct
Answers Guaranteed A+
Adhesive forces - CORRECT ANSWER: intermolecular forces between unlike (or different)
molecules
ex. water & plastics = weak adhesive force compares to cohesive forces between water
molecules (a drop forms)
ex. water & glass = water spreads out on glass since adhesive forces between water and glass are
greater than the cohesive forces within water
Arrehenius equation - CORRECT ANSWER: k = Ae^(-Ea/RT)
according to this equation, a higher temperature WILL produce a higher rate constant
Boiling Point Elevation - CORRECT ANSWER: The temperature at which the vapor pressure is
equal of all solute species
=Kb x m
*Kb=boiling point elevation constant
*m=molality of all species
capillary action - CORRECT ANSWER: when a liquid flows through a porous material due to
attraction of the liquid molecules to the suraface of the material and to other liquid molecules
=> the adhesive forces between the liquid and the material PLUS the cohesive forces within the
liquid are strong enough to move the liquid upward against gravity
** the liquid molecules will creep up the tube UNTIL the weight of the liquid and adhesive
forces are in balance
cohesive forces - CORRECT ANSWER: intermolecular forces that bind similar molecules to one
another ;
, the molecules WITHIN a liquid are surrounded by other molecules and are attracted EQUALLY
in all directions by the cohesive forces within a liquid
colligative properties - CORRECT ANSWER: properties that depend on the concentration of
solute particles but not on their identity (vapor pressure lowering, boiling point elevation,
freezing point depression, osmotic pressure)
colloids - CORRECT ANSWER: particles that are intermediate in size between those in
solutions and suspensions (particles that are larger than most simple molecules but small enough
that they don't settle out
Defining traits of a solution - CORRECT ANSWER: 1. homogenous when mixed together
2. physical state of that solution depends on the solvent
3.disolved solute in a solution will not settle out
4. composition of a solution can be varied continuously
dispersed phase vs. dispersion medium - CORRECT ANSWER: colloidal particles spread
throughout a suspension; the substance present in relatively low amounts
=solution or substance throughout which the particle is dispersed
dissociation - CORRECT ANSWER: change that results when ionic compounds dissolve in H2O
and the ions in the solid sepaerate and disperse uniformly throughout the solution because H2O
molecules surround and solvate the ions
Electrolytes - CORRECT ANSWER: Substances that release ions in water
formation of a solution - CORRECT ANSWER: when particles of the solute separate from each
other and become surrounded by particles of the solvent
, =where energy is consumed to overcome solute-solute & solvent-solvent attractions and
released when solute-solvent attractions are established (exothermic process)
**in some cases solutions will NOT form becaue the enrgy required to separate solute and
solvent species is MUCH greater than the energy released by formation of the solute-solvent
attraction
Freezing Point depression - CORRECT ANSWER: =Kf x M
*Kf = freezing point elevation constant
*M=molality
gel - CORRECT ANSWER: colloidal dispersion of a liquid in a solid
height that the liquid will climb due to capillary action - CORRECT ANSWER: H=2T cos0/rpg
*T=surface tension of the liquid
*0=contact angle between liquid and tube (glass tubes contact angle is 0 degrees)
*r=radius of the tube
*p=density of the liquid
*g=acceleration due to gravity (9.8 m/s2)
Henry's Law - CORRECT ANSWER: the solubility of a gas in a liquid is directly proportional to
the partial pressure of that gas on the surface of the liquid
how does temperature affect viscosity - CORRECT ANSWER: as we increase temperature,
molecules move mroe rapidly and their kinetic energies are better to overcome the forces that
hold them together (can move past each other more easily) = DECREASES viscosity
Ideal Solution - CORRECT ANSWER:
Instantaneous rate - CORRECT ANSWER:
2027 Exam 130 Questions with 100% Verified Correct
Answers Guaranteed A+
Adhesive forces - CORRECT ANSWER: intermolecular forces between unlike (or different)
molecules
ex. water & plastics = weak adhesive force compares to cohesive forces between water
molecules (a drop forms)
ex. water & glass = water spreads out on glass since adhesive forces between water and glass are
greater than the cohesive forces within water
Arrehenius equation - CORRECT ANSWER: k = Ae^(-Ea/RT)
according to this equation, a higher temperature WILL produce a higher rate constant
Boiling Point Elevation - CORRECT ANSWER: The temperature at which the vapor pressure is
equal of all solute species
=Kb x m
*Kb=boiling point elevation constant
*m=molality of all species
capillary action - CORRECT ANSWER: when a liquid flows through a porous material due to
attraction of the liquid molecules to the suraface of the material and to other liquid molecules
=> the adhesive forces between the liquid and the material PLUS the cohesive forces within the
liquid are strong enough to move the liquid upward against gravity
** the liquid molecules will creep up the tube UNTIL the weight of the liquid and adhesive
forces are in balance
cohesive forces - CORRECT ANSWER: intermolecular forces that bind similar molecules to one
another ;
, the molecules WITHIN a liquid are surrounded by other molecules and are attracted EQUALLY
in all directions by the cohesive forces within a liquid
colligative properties - CORRECT ANSWER: properties that depend on the concentration of
solute particles but not on their identity (vapor pressure lowering, boiling point elevation,
freezing point depression, osmotic pressure)
colloids - CORRECT ANSWER: particles that are intermediate in size between those in
solutions and suspensions (particles that are larger than most simple molecules but small enough
that they don't settle out
Defining traits of a solution - CORRECT ANSWER: 1. homogenous when mixed together
2. physical state of that solution depends on the solvent
3.disolved solute in a solution will not settle out
4. composition of a solution can be varied continuously
dispersed phase vs. dispersion medium - CORRECT ANSWER: colloidal particles spread
throughout a suspension; the substance present in relatively low amounts
=solution or substance throughout which the particle is dispersed
dissociation - CORRECT ANSWER: change that results when ionic compounds dissolve in H2O
and the ions in the solid sepaerate and disperse uniformly throughout the solution because H2O
molecules surround and solvate the ions
Electrolytes - CORRECT ANSWER: Substances that release ions in water
formation of a solution - CORRECT ANSWER: when particles of the solute separate from each
other and become surrounded by particles of the solvent
, =where energy is consumed to overcome solute-solute & solvent-solvent attractions and
released when solute-solvent attractions are established (exothermic process)
**in some cases solutions will NOT form becaue the enrgy required to separate solute and
solvent species is MUCH greater than the energy released by formation of the solute-solvent
attraction
Freezing Point depression - CORRECT ANSWER: =Kf x M
*Kf = freezing point elevation constant
*M=molality
gel - CORRECT ANSWER: colloidal dispersion of a liquid in a solid
height that the liquid will climb due to capillary action - CORRECT ANSWER: H=2T cos0/rpg
*T=surface tension of the liquid
*0=contact angle between liquid and tube (glass tubes contact angle is 0 degrees)
*r=radius of the tube
*p=density of the liquid
*g=acceleration due to gravity (9.8 m/s2)
Henry's Law - CORRECT ANSWER: the solubility of a gas in a liquid is directly proportional to
the partial pressure of that gas on the surface of the liquid
how does temperature affect viscosity - CORRECT ANSWER: as we increase temperature,
molecules move mroe rapidly and their kinetic energies are better to overcome the forces that
hold them together (can move past each other more easily) = DECREASES viscosity
Ideal Solution - CORRECT ANSWER:
Instantaneous rate - CORRECT ANSWER:
