Translated from Spanish to English - www.onlinedoctranslator.com
CLASSIFICATION
Open system or control volume:
THERMODYNAMIC SYSTEM It is one that exchanges energy and matter with the
surroundings.
SYSTEM
Control volume
It is the macroscopic part of the observable universe or
Subject SYSTEM Energy
physical world that is subjected to study.
OPEN
“It is an amount of matter that we want
study"
around
Example:
➢ volume of a gas
Boundaries permeable to matter and heat
➢ A liquid and its vapor
➢ A solution Closed system or control mass:
➢ a crystalline solid
It is one that exchanges energy (heat and work), but
➢ A complete refinery
not matter with the surroundings (its mass remains
➢ The amount of matter contained within a
constant).
tank closed by rigid walls
EXAMPLE 1:Study the pressure of water vapor as a
Control ground
function of temperature
Subject SYSTEM Energy
CLOSED
around
Boundaries permeable to heat, but impermeable to
subject
Isolated system:
How to study the thermodynamic property?
It is one that does not exchange energy or matter with the
➢ Put a container of water (sealed) surroundings (it does not allow influence from the
➢ Water bath at temperature (cte.) environment).
➢ Manometer to measure pressure
Who makes up the System?
➢ Water Subject
SYSTEM Energy
➢ Ice
➢ Water steam
ISOLATED
Surroundings?
around
➢ Isolated system
Boundaries impermeable to matter and heat
CLASSIFICATION
Open system or control volume:
THERMODYNAMIC SYSTEM It is one that exchanges energy and matter with the
surroundings.
SYSTEM
Control volume
It is the macroscopic part of the observable universe or
Subject SYSTEM Energy
physical world that is subjected to study.
OPEN
“It is an amount of matter that we want
study"
around
Example:
➢ volume of a gas
Boundaries permeable to matter and heat
➢ A liquid and its vapor
➢ A solution Closed system or control mass:
➢ a crystalline solid
It is one that exchanges energy (heat and work), but
➢ A complete refinery
not matter with the surroundings (its mass remains
➢ The amount of matter contained within a
constant).
tank closed by rigid walls
EXAMPLE 1:Study the pressure of water vapor as a
Control ground
function of temperature
Subject SYSTEM Energy
CLOSED
around
Boundaries permeable to heat, but impermeable to
subject
Isolated system:
How to study the thermodynamic property?
It is one that does not exchange energy or matter with the
➢ Put a container of water (sealed) surroundings (it does not allow influence from the
➢ Water bath at temperature (cte.) environment).
➢ Manometer to measure pressure
Who makes up the System?
➢ Water Subject
SYSTEM Energy
➢ Ice
➢ Water steam
ISOLATED
Surroundings?
around
➢ Isolated system
Boundaries impermeable to matter and heat
