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
Define the terms free energy and free enthalpy. What is their significance and importance ?
In terms of electrical enhineering, give a detailed explanation of the "earth fault loop path"
Explain the differences between pneumatics and hydraulics?
Write down the equation for conduction of heat through a slab or plane wall.
When looking at a flanged extension pipe and it is labeled DN20, just what does that mean or intel?
In some engines glycerine is used in place of water for cooling of engine. Why ?
what is the material of radiator sleeves or mesh?
What is the circulation of I.O. pump of diesel engine?
3x3x2.5 m room temperature increases by 20 deg cel in 24 hours by a lamp of 100 w. then tell the temperature of the filament
i have completed b.tech from mechanical engg so plz send me some question paper for entrance exam
What causes diesel engine trouble when using heavy oil?
Give five differences between suction and discharge pipes?
Horse power of i.c. Engines can be expressed as rac rating, sae rating, or din rating. To which countries these standards belong ?
Define Fluidised bed boiler ?
what is punching force required for embossing of depth 3.5mm and diameter 58mm
