Lec 1, 21/08/2014
Engineering Thermodynamics
Basic concepts
Moulay -Rachid Babaa
What is Thermodynamics
Thermodynamics is the study of processes in which
thermal energy is transferred as heat and as
mechanical work.
Developed around the time that the fi

1- Second Law
2- Thermodynamic properties
of fluids
Objectives
To introduce entropy as a state function.
Distinguish the thermodynamic properties which are measurable and
non-measurable.
Derive the important fundamental equations in thermodynamics.
State

Engineering Thermodynamics
L2
Energy in Thermal Processes and the
First Law of Thermodynamics
Internal Energy
Internal energy is all the energy of a system
that is associated with its microscopic
components
These components are its atoms and molecules

Lec 2 Cont
1
Thermal Capacities (Specific Heats)
Assume: A small quantity of heat (dQ) is given to a parcel
The parcel responds by experiencing a small temperature increase (dT)
Specific Heat (c):
dQ
c
dT
dQ
c v
dT constant
volume
Depends on how the m

Thermodynamic Processes
Thermodynamic Cycles:
Heat engines
Thermodynamic Processes
Properties Calculation for Process Changes using 1st Law
Thermodynamic
Processes
Constant Pressure
dH = dU + P dV
dQ = dH
Constant Volume
From 1st Law.
dU = dQ + dW
dW = -