(h, ln (P)) chart of a gas
Gap-fill exercise
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Identification of the main areas and curves of the chart
The (h, ln (P)) chart of an ideal gas has a single zone corresponding to the gaseous state.
In this chart,
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
is indicated on the abscissa, and
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
on the ordinate, most often on a logarithmic scale, so that the zone corresponding to the low pressures is more readable.
The curves in blue are the
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
, the curves in red are the
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
, and the curves in green are the
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
.
It will be noted that the isotherms are
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
due to the fact that
enthalpy
isotherms
iso-volumes
pressure
reversible adiabatic
the enthalpy of a gas
vertical
is independent of the pressure.
Check
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