CHEM103 - Module 6 REAL EXAM QUESTIONS WITH 100% RATED
CORRECT ANSWERS 2025 LATEST UPDATED GRADED A+
Why are liquids the least common state of matter? - (Correct Answer)they can exist only within a
relatively narrow range of temperatures and pressures
Differentiate between evaporation and vaporization. - (Correct Answer)Vaporization is the
conversion of liquid particles to vapor at the boiling point temperature of the material. The
process of liquid converting to vapor molecules can also take place in a very limited manner at
temperatures lower than the boiling point and is called evaporation.
Explain why the vapor pressure of a liquid increases with increasing temperature. - (Correct
Answer)Water molecules in the liquid state freely vibrate and rotate. As the temperature rises, the
vibrations and rotations become intense enough to overcome the forces that keep the molecules
together. The molecules begin to undergo translational motion allowing the molecules to convert
心的坚强决定了我们的命运。当
to the vapor state and these exert a pressure above the still-existing liquid molecules called the
我们面对挫折时，是一颗不屈的
vapor pressure of the substance. Higher temperature = greater conversion to vapor = higher
vapor pressure. 心让我们勇敢前行
Explain water's concave meniscus in terms of cohesive and adhesive forces. - (Correct
Answer)Cohesive forces are the attractions between particles of the same type, such as the bonds
between water molecules whereas adhesive forces are attractions between a particle of one type
and particles of a different type, such as the bonds between water molecule and those of its glass
container. These cohesive and adhesive forces combine to cause liquids to form a meniscus
(curved surface) in a glass tube. A liquid with strong cohesive forces, such as water, tries to roll
itself into a ball to minimize surface tension, but water is also attracted to the walls of any tube
by adhesive forces, causing the water to form a concave meniscus.
Why does diffusion take place quickly in a gas, more slowly in a liquid and not at all in a solid? -
(Correct Answer)Diffusion is the non-energy-requiring movement of particles from regions of
higher concentration to regions of lower concentration. Diffusion in a liquid occurs more slowly
than in a gas since the gas particles are moving more rapidly. Solids do not show the property of
diffusion since the particles in a solid can only vibrate around a fixed point rather than move
throughout the sample.
, Evaporation - (Correct Answer)The process of liquid converting to vapor molecules
Vaporization - (Correct Answer)Liquid becoming a gaseous steam
Viscosity - (Correct Answer)a measure of how thick or sticky a liquid is
adhesive forces - (Correct Answer)attractions between a particle of one type and particles of a
different type
Cohesive forces - (Correct Answer)the attractions between particles of the same type
weak electrolytes - (Correct Answer)solutes that only partially ionize
心的坚强决定了我们的命运。当
我们面对挫折时，是一颗不屈的
Vapor pressure - (Correct Answer)the pressure exerted by vapor molecules over a liquid
心让我们勇敢前行
triple point - (Correct Answer)the temperature and pressure conditions at which the solid, liquid,
and gaseous phases of a substance coexist
Surface tension - (Correct Answer)the force that causes a liquid which is in contact with a gas to
assume a shape that has the least amount of surface area causing the surface to act like an elastic
sheet
Sublimation - (Correct Answer)the conversion of a solid directly to the gas state
Strong electrolytes - (Correct Answer)Solutes that ionize completely
Phase - (Correct Answer)any state of matter such as solid, gas or liquid
CORRECT ANSWERS 2025 LATEST UPDATED GRADED A+
Why are liquids the least common state of matter? - (Correct Answer)they can exist only within a
relatively narrow range of temperatures and pressures
Differentiate between evaporation and vaporization. - (Correct Answer)Vaporization is the
conversion of liquid particles to vapor at the boiling point temperature of the material. The
process of liquid converting to vapor molecules can also take place in a very limited manner at
temperatures lower than the boiling point and is called evaporation.
Explain why the vapor pressure of a liquid increases with increasing temperature. - (Correct
Answer)Water molecules in the liquid state freely vibrate and rotate. As the temperature rises, the
vibrations and rotations become intense enough to overcome the forces that keep the molecules
together. The molecules begin to undergo translational motion allowing the molecules to convert
心的坚强决定了我们的命运。当
to the vapor state and these exert a pressure above the still-existing liquid molecules called the
我们面对挫折时，是一颗不屈的
vapor pressure of the substance. Higher temperature = greater conversion to vapor = higher
vapor pressure. 心让我们勇敢前行
Explain water's concave meniscus in terms of cohesive and adhesive forces. - (Correct
Answer)Cohesive forces are the attractions between particles of the same type, such as the bonds
between water molecules whereas adhesive forces are attractions between a particle of one type
and particles of a different type, such as the bonds between water molecule and those of its glass
container. These cohesive and adhesive forces combine to cause liquids to form a meniscus
(curved surface) in a glass tube. A liquid with strong cohesive forces, such as water, tries to roll
itself into a ball to minimize surface tension, but water is also attracted to the walls of any tube
by adhesive forces, causing the water to form a concave meniscus.
Why does diffusion take place quickly in a gas, more slowly in a liquid and not at all in a solid? -
(Correct Answer)Diffusion is the non-energy-requiring movement of particles from regions of
higher concentration to regions of lower concentration. Diffusion in a liquid occurs more slowly
than in a gas since the gas particles are moving more rapidly. Solids do not show the property of
diffusion since the particles in a solid can only vibrate around a fixed point rather than move
throughout the sample.
, Evaporation - (Correct Answer)The process of liquid converting to vapor molecules
Vaporization - (Correct Answer)Liquid becoming a gaseous steam
Viscosity - (Correct Answer)a measure of how thick or sticky a liquid is
adhesive forces - (Correct Answer)attractions between a particle of one type and particles of a
different type
Cohesive forces - (Correct Answer)the attractions between particles of the same type
weak electrolytes - (Correct Answer)solutes that only partially ionize
心的坚强决定了我们的命运。当
我们面对挫折时，是一颗不屈的
Vapor pressure - (Correct Answer)the pressure exerted by vapor molecules over a liquid
心让我们勇敢前行
triple point - (Correct Answer)the temperature and pressure conditions at which the solid, liquid,
and gaseous phases of a substance coexist
Surface tension - (Correct Answer)the force that causes a liquid which is in contact with a gas to
assume a shape that has the least amount of surface area causing the surface to act like an elastic
sheet
Sublimation - (Correct Answer)the conversion of a solid directly to the gas state
Strong electrolytes - (Correct Answer)Solutes that ionize completely
Phase - (Correct Answer)any state of matter such as solid, gas or liquid
