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chapter 13 chemistry
Terms in this set (42)
vaporization at the surface of a liquid that is not boiling
the conversion of a liquid to a gas below the boiling point
the temperature at which the vapor pressure of a liquid is equal to the external pressure
normal boiling point
the temperature at which the vapor pressure of a liquid is equal to 1 atmosphere
the temperature at which a solid changes into a liquid
the change of a solid directly to a vapor
all matter consists of tiny particles that are in constant motion
the energy an object has due to its motion
a device used to measure atmospheric pressure
the pressure resulting from the collision of atoms and molecules with objects
a measure of the force exerted by a gas above a liquid
are perfectly elastic
according to the kinetic theory, collisions between molecules in gas_________
d. all of the above
which of the following statements is part of the kinetic theory?
a. the particles of a gas move independently of each other
b. the particles in a gas move rapidly
c. the particles in a gas are relatively far apart
d. all of the above
small, hard spheres with insignificant volumes
particles in a gas are best described as
a. slow-moving kinetic hard spheres
b. small, hard spheres with insignificant volumes
c. hard spheres influenced by repulsive forces from other spheres
d. spheres that are in fixed positions when trapped in a container
particles usually travel uninterrupted indefinately
which of the following statements in NOT true about the movement of particles in a gas?
a. particles travel in straight-line paths until they collide with other objects
b. the aimless path taken by particles is known as a random walk
c. particles usually travel uninterrupted indefinitely
d. particles fill their containers regardless of the shape or volume of the container
what is the SI unit of pressure?
what is one standard atmosphere of pressure in kilopascals?
0 C and 101.3 kPa
standard conditions when working with gases are defined as.....
the simultaneous collisions of fast-moving particles in the container
what causes gas pressure in a container such as helium balloon?
a. the walls of the container
b. the vacuum maintained in the container
c. the simultaneous collisions of fast-moving particles in the container
d. atmospheric pressure acting on the outside walls of the container
the pressure of a gas in a container is 152 mm Hg. This is equivalent to how many atms?
the temperature at which the motion particles theoretically ceases is.....
the average kinetic energy increases
what happens to the average kinetic energy of the particles in a sample of matter as the temperature of the sample is increased?
with which temperature scale is temperature directly proportional to average kinetic energy?
is directly proportional to the temperature of the substance
the average kinetic energy of the particles of a substance.......
steam at 100 C
the average kinetic energy of water molecules is greatest in....
what is the key difference between a liquid and a gas?
gases and liquids only
which states of matter can flow?
what happens to the temperature of a liquid as it evaporates?
what happens to the rate of evaporation of a liquid as the liquid is cooled?
water at 40 C
which of the following will evaporate the fastest?
a. water at 0 C
b. water at 40 C
c. water at 20 C
d. all samples will evaporate at the same rate
it is equal to the rate of condensation
in a dynamic equilibrium between the liquid state and the gas state, what is true about the rate of evaporation?
it increases at first, then remains constant
if a liquid is sealed in a container and kept at constant temperature, how does its vapor pressure change over time
causes the vapor pressure above the liquid to increase
an increase in the temperature of a contained liquid......
it does not change
if energy is added to a boiling liquid, what happens to the temperature of the liquid?
begins to boil
when the vapor pressure of a liquid is equal to the atmospheric pressure, the liquid....
what is the pressure when a liquid is boiling at its normal boiling point?
when the external pressure is 505 kPa, what is the vapor pressure of water at its boiling point?
are dense and difficult to compress
the escape of molecules from the surface of a liquid is known as....
the direct change of a substance from a solid to a gas is called.....
which of the following is an example of a phase?
c. water vapor
d. triple point
by a line separating the phases
how are conditions of pressure and temperature, at which two phases coexist in equilibrium, shown on a phase diagram
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