The Carnot cycle is composed of how many reversible processes?
A2
B3
C4
D5
ESAS · Question Bank
Thermodynamics
308 of 308 questions match · page 12 of 16. Answer in your head first, then check the solution.
The Carnot cycle is composed of ___________ processes
Aone isothermal and one adiabatic
Bone isothermal and two adiabatic
Ctwo isothermal and one adiabatic
Dtwo isothermal and two adiabatic
What is the highest efficiency of heat engine operating between the two thermal energy reservoirs at temperature limits?
AEricson efficiency
BOtto efficiency
CCarnot efficiency
DStirling efficiency
What is a heat engine that operates on the reversible Carnot cycle called?
ACarnot heat engine
BIdeal heat engine
CMost efficient heat engine
DBest heat engine
What states that the thermal efficiencies of all reversible heat engines operating between the same two reservoirs are the same and that no heat engine is more efficient than a reversible one operating between the same two reservoirs?
AEricson principle
BCarnot principle
COtto principle
DStirling principle
The second law of thermodynamics discovered the "entropy" on what year?
A1856
B1865
C1878
D1895
"A reversible adiabatic process is necessarily isentropic but an isentropic process is not necessarily reversible adiabatic process" This statement is
Atrue
Bfalse
Cmay be true and may be false
Dabsurd
The term "isentropic process" used in thermodynamic implies what?
Areversible adiabatic process
Bexternally reversible, adiabatic process
Cinternally reversible, adiabatic process
Dirreversible adiabatic process
What states that the entropy of a pure crystalline substance at absolute zero temperature is zero?
AZeroth law of thermodynamics
BFirst law of thermodynamics
CSecond law of thermodynamics
DThird law of thermodynamics
What law provides an absolute reference point for the determination of entropy?
AZeroth law of thermodynamics
BFirst law of thermodynamics
CSecond law of thermodynamics
DThird law of thermodynamics
"The entropy change of a system during a process is equal to the net entropy transfer through the system boundary and the entropy generated within the system" This statement is known as
AEntropy generation
BEntropy change of a system
CEntropy balance relation
DThird law of thermodynamics
What law states that entropy can be created but it cannot be destroyed?
AZeroth law of thermodynamics
BFirst law of thermodynamics
CSecond law of thermodynamics
DThird law of thermodynamics
Entropy is transferred by _________
Awork
Bheat
Cenergy
Dwork and heat
Water boils when:
Aits saturated vapor pressure equals the atmospheric pressure
Bits vapor pressure equals 76 cm of mercury
Cits temperature reaches \( 212^\circ C \)
Dits vapor pressure is 1 g per cm²
Which of the ff is standard temperature and pressure (STP) ?
A\( 0^\circ C \) and 1 atm
B32ºF and 0 pressure
C0ºK and 1 atm
D0ºF and 0 pressure
What is the value of work done for a closed, reversible isometric system?
Azero
Bpositive
Cnegative
Deither positive or negative
"At constant temperature, the volume of a gas is inversely proportional to the pressure" This is known as _________
ABoyle's law
BCharle's law
CGay-lussac law
DIdeal gas law
Which of the ff is the mathematical representation of the charle's law?
AV1/V2 = P2/P1
BV1/T1 = V2/T2
CV1/T2 = V2/T1
DV1/V2 = sqrt(P2/P1)
Which of the ff is the formula for thermal resistance?
Athickness of material / thermal conductivity of material
B2*thickness of material / thermal conductivity of material
Cthickness of material / 2*thermal conductivity of material
Dthickness of material x thermal conductivity of material
For heat engine operating between two temperatures (T1>T2), what is the maximum efficiency attainable?
AEff = 1 - T2/T1
BEff = 1 - T1/T2
CEff = T2 - T1
DEff = 1 - (T2/T1)²