LAWS OF THERMODYNAMICS

Thermodynamics (physics) full forms/abbreviations



Definition of thermodynamics
thermodynamics deals with the transfer of energy from one place to another and from one form to another.

here are the all full forms / abbreviation & important definitions in thermodynamics :-

Abbreviation

Full Form

IP ISOTHERMAL PROCESS
AP ADIABATIC PROCESS
AT APPLIED THERMODYNAMICS
KS KELVIN'S STATEMEMT
CS CLAUSIUS STATEMENT
FLT FIRST LAW OF THERMODYNAMICS
ICE INTERNAL COMBUSTION ENGINE
ECE EXTERNAL COMBUSTION ENGINE
GEM GIBBS ENERGY MINIMIZATION
CT CARNOT THEORM
CHE CARNOT HEAT ENGINE
HP HEAT PUMP
IG IDEAL GAS
IE INTERNAL ENERGY
CT COMPUTATIONAL THERMODYNAMICS
ICAT INERNATIONAL CENTRE FOR APPLIED THERMODYNAMICS
TH TRANSMISSION OF HEAT
SP SPONTENIOUS PROCESS
MP MASS PRODUCTION
FD FLUID DYNAMICS
CPM CHEMICAL PROCESS MODELING
CT COMPUTATIONAL THERMODYNAMICS
IACT INTERNATIONAL ASSOCIATION OF CHEMICAL THERMODYNAMICS
EIT EXTENDED IRREVERSIVLE THERMODYNAMICS

 
THERMODYNAMICS' IMPORTANT DEFINITIONS:-

FIRST LAW OF THERMODYNAMICS:-



FIRST LAW OF THERMODYNAMICS IS A VERSION OF THE LAW OF CONSERVATION  OF ENERGY. IT STATES THAT ENERGY CAN NEITHER BE CREATED NOR BE DESTROYED, IT CAN BE CONVERTED FROM ONE FORM TO ANOTHER.

heat energy given to a system is used in the following two ways
  1. in increasing the temperature and hence internal energy of the system.
  2. in doing work by the system 
if    ∇Q=heat energy given to the system
∇U= increase in the internal energy of the system
∇W= work done by the system 
then, ∇Q=∇U+∇W is the mathematical statement of first law of thermodynamics.

  • Internal energy of a system may be potential as well as kinetic energy. the kinetic energy arises due to molecular motion which may be translational, rotational and vibrational.
  • first law of thermodynamics is equivalent to principle of conservation of energy.
ISOTHERMAL PROCESS: if the changes are taking place in a system in such a way that temperature of the system remains constant throughout the change, then the process is said to be isothermal.

ADIABATIC PROCESS: if the changes are taking place in a system in such a way that there is no exchange of heat energy between the system and the surrounding, then the process is said to be an adiabatic process.

example of adiabatic process: when carbon dioxide is suddenly expanded then it is changed into dry ice.

SECOND LAW OF THERMODYNAMICS

the first law of thermodynamics guarantees that in a thermodynamic process, energy will be conserved. But this law does not tell whether a given process in which energy is conserved will take place or not.
The following two forms are worth mentioning:

KELVIN'S STATEMENT- according to kelvin whole of the heat can never be converted into work.
CLAUSIS STATEMENT- heat by itself can not flow from a body at lower temperature to a body at higher temperature.

CARNOT THEOREM:
  1. All the reversible heat engine operating between the same source and sink have same efficiency independent of nature of working substance.
  2. No heat engine operating between two given temperature will have more efficiency than a reversible heat engine operating between the same two temperatures.
Efficiency of ideal Carnot heat engine: [ η= 1-T1/T2], T1 & T2 being the temperature of source and sink.

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