1. D A V E G A U R A V S
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M . T E C H S E M 1
P D P U
First Law of Thermodynamics
Closed and Open System
2. First Law
Energy can neither be created nor be destroyed. It
can transformed from one form to another
Work and heat are different form of same entity
called energy.
Energy which enters the system in form of heat may
leave as work or energy which enters in form of work
may leave as heat.
3. where j is joules constant
which is a cyclic process.
4. First law for closed system undergoing change of
state
𝑄 − 𝑊 = δ𝐸
Where E is change in the internal energy of the
system.