What is First law of
thermodynamics?
The heat lost by a system is equal to the heat gained by the
system minus any work done by the system; conservation of energy. Or
According
to the first law of thermodynamics, energy cannot be created or destroyed,
although it can change from one form to another.
What are the
limitations of first law of thermodynamics?
First
law of thermodynamics has the limitation that it merely indicates that in any
process there is an exact equivalence between various forms of energy. It
provides no information concerning the spontaneity or feasibility of the
process.
What is Second law of
thermodynamics?
Heat flows naturally from a region of higher temperature to
a lower temperature. All natural systems tend toward a state of higher disorder.
Or
According to the second law of thermodynamics, when energy
is converted from one form to another, some of it is degraded into heat, a less
usable form that disperses into the environment.
What is the second law of thermodynamics in as many ways?
Various
statements of second law of thermodynamics are:
1) All spontaneous processes (or naturally occurring processes) are thermodynamically irreversible.
2) Without the help of an external agency, a spontaneous process cannot be reversed.
3) The complete conversion of heat into work is impossible without leaving some effect elsewhere.
4) The entropy of the universe is continuously increasing.
1) All spontaneous processes (or naturally occurring processes) are thermodynamically irreversible.
2) Without the help of an external agency, a spontaneous process cannot be reversed.
3) The complete conversion of heat into work is impossible without leaving some effect elsewhere.
4) The entropy of the universe is continuously increasing.
What is Carnot
theorem?
It states that no heat engine operating in a cycle between
two constant temperature heat reservoirs can be more efficient than a
reversible engine operating between the same reservoirs.