Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / azmi.2004
First Law of Thermodynamics
The first law of thermodynamics is the application of the
conservation of energy principle to heat and thermodynamic
processes:
The first law makes use of the key concepts of internal
energy, heat, and system work. It is used extensively in the
discussion of heat engines. The standard unit for all these
quantities would be the joule, although they are sometimes
expressed in calories or BTU.
It is typical for chemistry texts to write the first law as
ΔU=Q+W. It is the same law, of course - the thermodynamic
expression of the conservation of energy principle. It is
just that W is defined as the work done on the system
instead of work done by the system. In the context of
physics, the common scenario is one of adding heat to a
volume of gas and using the expansion of that gas to do
work, as in the pushing down of a piston in an internal
combustion engine. In the context of chemical reactions and
process, it may be more common to deal with situations where
work is done on the system rather than by it.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
Heat a vessel with water inside and cool it under tap suddenly. Now when we try to open it...It does not open easily ...why?
Explain the hooke`s coupling.
How does the steam work in a steam turbine?
Dear Friends I want to previous 5-10 years technical and non tech. question paper of section engineer (mechanical)of RRB and also tell me how should I prepare for S.E. and which books will help me for technical,aptitude,resoning.plz send me at bkcs.bkcs@rediffmail.com
effect of temperature on stainless steel,aluminized steel,chromium at (500C-750C)-required for project work on silencer 1.thermal conductivity 2.heat conduction 3.mechanical strength 4.temperature to weight ratio urgent
What happen when too much cylinder oil is injected in the working cylinder?
What is the turbine and how does it work?
What do you understand by sulphur print ?
if any one who attended the caterpillar interview please send me the sample questions and the areas from which questions are being asked...
What is the unit of viscosity?
In General please do read newspapers.And be thorough with 10th history and Geography.Biology also
Which element is added in steel to increase resistance to corrosion ?
Explain how does a super charger work in a car?
on which basis safety valves are set with particular pressures?
what is advantage and disadvantage of forward curve and backward curve blade of an id fan impeller and FD fan impeller??
