ENERGY AND THE FIRST LAW OF
The objectives of this chapter are to:
Introduce the concept of energy and
define its various forms.
Develop some of the relationships for
work and heat transfer needed to apply
the principle of conse
CONCEPTS AND DEFINITIONS
Thermodynamics: the science of energy.
Energy: the ability to cause changes.
The name thermodynamics stems from the Greek
words therme (heat) and dynamis (power).
The objective of this chapter is to explain
SUMMARY OF KEY EQUATIONS IN CHAPTER 1
Specific Volume (mass basis):
v = 1/ = V/m
Specific Volume (mole basis):
and M = m/n
where M = molecular weight (kg/kmol or lb/lbmol), see Tables
A-1 & A-1E for values of M
n = number of moles
SUMMARY OF KEY EQUATIONS IN CHAPTER 2
= mg (
U = m (u2
E = U + KE + PE
Expansion or compression work: W =
Energy balance for closed systems: E =