ENERGY, WORK, AND HEAT
Thermodynamics
ENERGY, WORK, AND HEAT
Heat and work are the two ways in which energy can be transferred across the
boundary of a system. One of the most important discoveries in thermodynamics
was that work could be converted into an equivalent amount of heat and that heat
could be converted into work.
EO 1.8
DEFINE the following:
a.
Heat
b.
Latent heat
c.
Sensible heat
d.
Units used to measure heat
EO 1.9
DEFINE the following thermodynamic properties:
a.
Specific enthalpy
b.
Entropy
Energy
Energy is defined as the capacity of a system to perform work or produce heat.
Potential Energy
Potential energy (PE) is defined as the energy of position. Using English system units, it is
defined by Equation 1-11.
(1-11)
PE
mgz
gc
where:
PE
=
potential energy (ft-lbf)
m
=
mass (lbm)
z
=
height above some reference level (ft)
g
=
acceleration due to gravity (ft/sec2)
gc
=
gravitational constant = 32.17 ft-lbm/lbf-sec2
HT-01
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