W
TI
h
Paddle wheel Water
,
22
12
=
)
(
)
2
This
is
called
non-flow
energy
equation.
=
22
12
=
(
)
(
)
=
(
)
2
=
and
=
=
=
0;
=
0
=
and
=
This
shows
that
the
first
law
of
thermodynamics
is
the
law
of
conservation
of
energy.
,