Which of the following is the Ideal gas law (equation)?
A\( V/T = k \)
B\( V = k/p \)
C\( P_1/T_1 = P_2/T_2 \)
D\( PV = nRT \)
ESAS · Question Bank
Thermodynamics
274 of 308 questions match · page 1 of 14. Answer in your head first, then check the solution.
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 gram per sq. cm
How many independent properties are required to completely fix the equilibrium state of a pure gaseous compound?
A4
B3
C2
D1
Which of the following is standard temperature and pressure (STP)?
A\( 0^\circ C \) and one atmosphere
B\( 32^\circ F \) and zero pressure
C\( 0 K \) and one atmosphere
D\( 0^\circ F \) and zero pressure
For a heat engine operating between two temperatures (\( T_2 > T_1 \)), what is the maximum efficiency attainable?
A\( 1 - T_1/T_2 \)
B\( 1 - T_2/T_1 \)
C\( T_1 - T_2 \)
D\( 1 - T_1^2/T_2 \)
What is the value of work done for a closed, reversible isometric system?
Azero
Bpositive
Cnegative
Dpositive or negative
The first law of thermodynamics is based on which principle?
AConservation of mass
BConservation of energy
CAction and reaction
DEntropy–temperature relationship
Which cycle is used in a vapor cycle power plant?
ABrayton cycle
BDiesel cycle
CEricson cycle
DRankine cycle
Which of the following is not a thermodynamic property?
APressure
BTemperature
CVolume
DPhase
What is the compressibility factor of an ideal gas?
A1
B2
C1.5
D0
The energy that includes all kinetic and potential energies of molecules is called:
AInternal energy
BEnthalpy
CEntropy
DTotal energy
Which properties depend on the amount of substance present?
AExtensive properties
BIntensive properties
CReversible properties
DIrreversible properties
Which properties are independent of the amount of substance present?
AIntensive properties
BExtensive properties
CReversible properties
DIrreversible properties
What is the total heat content and useful energy of a substance?
AEnthalpy
BEntropy
CInternal energy
DLatent heat
What measures energy unavailable for useful work and molecular randomness?
AEntropy
BEnthalpy
CInternal energy
DFlow work
What is the temperature when water and vapor are in equilibrium at atmospheric pressure?
AIce point
BSteam point
CCritical point
DFreezing point
What is the state where solid, liquid, and gas coexist in equilibrium?
ATriple point
BCritical point
CBoiling point
DPour point
At what state are liquid and gas phases indistinguishable?
ATriple point
BCritical point
CBoiling point
DPour point
What heat changes temperature without changing phase?
ALatent heat
BSensible heat
CSpecific heat
DEntropy
What heat raises the temperature of \( 1 \) kg of water by \( 1^\circ C \)?
AKilojoule
BBtu
CKilocalorie
DLatent heat