Answer / satish kalyanashetti

a. HEAT AND MECHANICAL WORK ARE MUTUALLY CONVERTABLE.
b. ENERGY CAN BE CREATED NOR BE DISTROYED BUT IT CAN BE
TRANSFERED FROM ONE FORM TO ANOTHER FORM

Answer / dhroov

energy can neither be created nor be destroyef, can b
transformed from one energy to otherr

Answer / sandeep

Dear frnd THE ABOVE QUOTED STATEMENT IS ZEROTH LAW OF
THERMODYNAMICS. 1st law is the change in the internal energy
of a system is equal to the amount of heat supplied to the
system, minus the amount of work performed by the system on
its surroundings.

Answer / neeraj

for open system
heat and work are mutually convertible.

for close system
energy can neither be created nor be destroyed, but it can be change in one form of energy to other form.

Answer / khatrani bhaskar

enwrgy neighter be created nor be destroid it convet one
form to another

Answer / abhay singh yadav

First law of thermodynamics basically consist of two statement, in which first statement is for system undergoing a cycle. Here, for cyclic path change in work done is directly proportional to the change in heat of system.
i.e, cyclic integral of dW=J×cyclic integral of dQ
where, J = joules equivalent.
and First law of thermodynaimc for closed system undergoing a change of state is that when both heat and work is transfered to the system then NET ENERGY transfered will be stored or accumulated within the system.
so it is the formulation principle of conertion.

Answer / ashutosh paikaray

energy can not be created nor be destroy,it will transform from one to another system

Answer / 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.

Answer / kannan

ist law of thermodynamics is also called law of conservation
energy
it is also stated as when two bodies are separately
equilibrium with the third body then the bodies said to be
in equilibrium with each other

Please any one help me I preparing for the post of charge man in Indian ordinance factory please give me some guide line & book for this exam.my email. anoopkpandey16@gmail.com

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