Thermodynamics A214 Chapter 2 Summary Notes

Chapter 2 :
Energy
Forms of
Energy
:




kinetic : Total KE =
42mV ' LKJ ]
Specific the = 42th LKJIKGJ
Power IIE =
Hanif LKW ]


potential : Total pE= mgh LKJ ]
specific pe =
gh LKJIKGJ
Power IE LKWJ
=
nigh
Internal : Total V LKJJ
or molecular specific U [ KJIKG]
sensible is
power LKWJ
later

Flow Work: Total bprfeswsuipyyvdome
=p xAxL LKJJ
specific fw =P LKJIKG)
Power F⇐densiey
Ew=pj LKW]


Flow work A pressure force fluid
" "



pushing
-
a



through a distance in an open system

E= + PE1-1LE t FW

,In an open system we
might have a
massflowraee-cn.nl
or a
watch Cli ) that we need to be

able to calculate
density
-




cross sectional


Mass flow rate in =p v. = } v A
← area



+
velocity
mass flow
Flow Role I nice
Energy
=

←
= specific energy
Power LKW]


Mechanical The form of that
Energy energy
- can


be converted into work done

machine
by a



- ④ ⑤ *


Change in specific Demean =
42C VE -
vi ) tglhs-h.lt PaI
Mechanical
Energy p