Introduction Flashcards
What is the meaning of Thermodynamics?
Heat in motion
Universe is made up of?
System + Surrounding
What is system?
1)Part under investigation
2) small part, interested part
What is surrounding ?
Everything except system
Boundary can be of how many types?
1)
a) Rigid
b) Flexible
2)
a) Real
b) Imaginary
3)
a) Diathermic
b) Adiabatic
What is Diathermic boundary?
Boundary through which heat can flow easily
What is Adiabatic boundary?
Boundary through which heat cannot flow
∆q=0
How many types of system are there and what are they?
1) Open system
2) Closed system
3) Isolated system
What is open system?
Such a system where MASS exchange as well as ENERGY exchange takes place
It has IMAGINARY boundary
How energy exchange takes place?
By
1)Heat
Or
2) Work
What us closed system?
Such a system where only ENERGY takes place
NO mass exchange
( In a closed vessel)
What is Isolated system?
Such a system where no mass exchange as well as no energy exchange takes place
It has Adiabatic ( insulating) boundary
Extensive Property?
Depends upon
1) Amount of matter
2) Size of sample
Examples of Extensive?
1) Mass
2) Volume
3) No of moles
4) Heat Capacity
5) Energy - Heat , Work
6) Enthalpy
7) Entropy
8) Gibb’s Free Energy
9) Internal Energy
Intensive properties meaning?
Does not depend upon
Size of sample or amount of matter
Intensive Properties examples?
1) Density
2) Reflective Index
3) Specific Heat Capacity
4) Temperature
5) Pressure
6) Concentration
7) Molarity
8) Molality
9) Mole Fraction
10) Normality
11) Molar Entropy/ Enthalpy
( Entropy=Energy)
12) pH
Extensive/Extensive=?
Intensive
( X/Y= Z)
Formula of Electromotive force?
E.F =Work/ Heat
(W/Q)
State Variables/ State Functions/ State parameters meaning?
Variables which define the state or condition of system
State Functions depends upon only INITIAL and FINAL state
eg- PRESSURE, VOLUME, TEMPERATURE of gas
State Variables examples?
1) Pressure
2) Temperature
3) Volume
4) no of moles ( n)
5) Enthalpy (H)
6) Entropy (S)
7) Internal Energy ( E/U)
8) Gibb’s Free Energy ( G)
Heat and Work are state Functions .
Is it true?
NO, not true
Heat & Work are PATH function
What is the value of change in state Functions in any cyclic process?
ZERO
Because state functions depends upon initial & final state and in cyclic they are the same
