M1L2 - Pure Substance Flashcards
chemically homogeneous
and have a constant chemical composition
pure substance
identified as having a distinct molecular arrangement that is
homogeneous throughout and separated from the others by easily
identifiable boundary surface
phase
The
molecules in a BLANK are arranged in a three dimensional pattern
( that is repeated throughout
solid
The
molecules in a BLANK phase is not much different from that of solid
phase, except the molecules are no longer at fixed positions relative to
each other and they can rotate and translate freely
liquid
the molecules are far apart from each other, and a
molecular order is nonexistent
gas
When
a liquid is at a temperature that is lower than its saturation temperature at a
certain pressure or is at a pressure that is higher than its saturation pressure at a
certain temperature. This liquid is not about to vaporize.
subcooled liquid or compressed liquid
When
a liquid is in a temperature that is equal to the saturation temperature at a
certain pressure or is in a pressure that is equal to saturation pressure at a certain
temperature. this liquid is about the vaporize.
saturated liquid
when saturation
temperature is reached at a certain pressure,
and heat addition continues, part of the
saturated liquid vaporizes and liquid and
vapor phases coexist in equilibrium
saturated liquid - vapor mixture
Once
phase change process is completed, all of the saturated liquid had been
changed to BLANK while maintaining the saturation temperature and
pressure.
saturated vapor
When
this superheated vapor is further heated until
reaching temperature higher than the saturated
temperature at a certain pressure, this vapor is called?
superheated vapor
At
a given pressure, or actual pressure, the temperature at which a pure substance
changes phase is called?
saturation temperature
at a given temperature, or say actual temperature, the pressure at which a
pure substance changes phase is called?
saturation pressure
The
amount of energy needed absorbed or released during a phase change process
is called?
latent heat
If
the energy is absorbed during melting, it is called BLANK and is
equivalent of the amount of energy released during freezing
latent heat of fusion
the amount of energy absorbed during vaporization is called the
BLANK and is equivalent to the energy released during
condensation
latent heat of vaporization
the point
at which the saturated liquid
and saturated vapor states are
identical.
critical point
The
saturated liquid states can
be connected by a line called
the?
saturated liquid line
and
saturated vapor states can be
connected by another line
called?
saturated vapor line
All
compressed liquid states
are located at the left side of
the saturated liquid line called?
compressed liquid region
All
superheated vapor states are
located at the right side of
saturated vapor line called?
superheated vapor region
The
P T diagram is also called
the BLANK since all
three phases are separated
from each other by three
lines
phase diagram
a property that essentially combines the heat content of a system with
the work it can do due to its pressure and volume
enthalpy
the ratio of the mass of
vapor to the total mass of the mixture
of saturated liquid and vapor
quality, x
In
the region to the right of the
saturated vapor line and at
temperatures above the critical
point temperature, a substance
exists as?
superheated vapor
