Physical Chemistry

adiabatic
thermally insulating (boundary)
two temps in contact, no equalization
Thermal Equilibrium
no change of state occurs when two objects A to B are in contact through a diathermic boundary.
perfect gas equation
pV=nRT
system
the part of the world in which we have a special
interest.
surroundings
region outside the system
open system
matter can be
transferred through the boundary
closed system
matter cannot pass through the boundary
isolated system
neither mechanical nor thermal contact
with its surroundings
First Law Thermodynamics
The internal energy of an isolated system is constant.
reversible
a change that can be reversed by an
infinitesimal modification of a variable
x

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