Chapter 1 Flashcards
First law of thermodynamics
Conservation of energy principle (cannot be created or destroyed)
Second law of thermodynamics
Non-conservation of Exergy (about how and why exergy is destroyed) entropy is inevitable
Third law of thermodynamics
The entropy of a PURE CRYSTALINE SUBSTANCE at ABSOLUTE ZERO is 0
The zeroth law of thermodynamics
If one part of the system is x-temp the other areas are also x-temp
Intensive Properties
Independent of the size of the system
Destiny
Temperature
Pressure
Extensive properties
Dependent on the size of the system
Mass
Volume
Total specific energy
Specific gravity/ how to find density
Relative density
Funny looking P
Temperature dependent
P=m/V
Pressure and units
The force exerted by a fluid in kPa
Pascal=1N/1m^2
Manometer
how to calculate the pressure difference
Positive if going with gravity
Negative if going against gravity
“Iso”
Something is constant
Thermal equilibrium
Temp is constant throughout the system
Mechanical equilibrium
The pressure is the same through the system
Phase equilibrium
The mass of each phase, in a system with 2 phases is not changing
Chemical equilibrium
The chemical composition of the system does not change with time
Isothermal
Constant temperature
Isobaric
Constant pressure
Isochoric
Constant volume
Isenthalpic
Constant enthalpy
Isentropic
Constant entropy
Adiabatic
No heat transfer
SSSF process
Steady state-steady flow
Open system where there are mass flows cross the boundary
USUF process
Uniform state-uniform flow
Open system where mass if accumulated over time in a system
Specific Enthalpy (h)
h=u+P*v
u is the fluid internal energy in J/kg
P is the fluid pressure
v is the fluid specific volume in m^3/kg
Specific total energy flow (e)
