CM 2113 WANG TEST 2 EXAM (LATEST) || MOST
RECENT EXAM 2026|2027 ACTUAL COMPLETE REAL
EXAM QUESTIONS AND CORRECTLY WELL DEFINED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED
A+ | GUARANTEED SUCCESS!! NEWEST EXAM | JUST
RELEASED!!
Which thermodynamic property is a state function?
A. Heat
B. Work
C. Internal energy
D. Friction
Answer: C. Internal energy
Rationale: Internal energy depends only on the current state of a system,
not on the path taken to reach that state. Heat and work are path
functions because their values depend on the specific process involved.
Understanding the distinction between state and path functions is
fundamental in thermodynamics.
According to the First Law of Thermodynamics, energy:
A. Can be created.
B. Can be destroyed.
,C. Is conserved.
D. Exists only as heat.
Answer: C. Is conserved.
Rationale: The First Law of Thermodynamics states that energy cannot
be created or destroyed but can be transferred or transformed from one
form into another. This law forms the basis for energy balance
calculations in chemistry and engineering.
Which process typically has ΔH equal to zero for an ideal gas?
A. Isobaric process
B. Isochoric process
C. Isothermal process
D. Adiabatic process
Answer: C. Isothermal process
Rationale: The enthalpy of an ideal gas depends only on temperature.
During an isothermal process, the temperature remains constant,
resulting in no change in enthalpy.
The SI unit of pressure is:
A. Atmosphere
B. Torr
,C. Pascal
D. Bar
Answer: C. Pascal
Rationale: The pascal (Pa), equivalent to one newton per square meter,
is the SI unit of pressure. Other pressure units are commonly used but
are not the SI standard.
Which gas law states that pressure is inversely proportional to volume
at constant temperature?
A. Charles's Law
B. Boyle's Law
C. Gay-Lussac's Law
D. Avogadro's Law
Answer: B. Boyle's Law
Rationale: Boyle's Law states that pressure and volume have an inverse
relationship for a fixed amount of gas at constant temperature. As
volume decreases, pressure increases proportionally.
The standard enthalpy change for the formation of an element in its
standard state is:
A. 100 kJ/mol
, B. 1 kJ/mol
C. 0 kJ/mol
D. −100 kJ/mol
Answer: C. 0 kJ/mol
Rationale: By convention, the standard enthalpy of formation of a pure
element in its most stable form under standard conditions is assigned a
value of zero.
Which equation relates Gibbs free energy to enthalpy and entropy?
A. PV = nRT
B. q = mcΔT
C. ΔG = ΔH − TΔS
D. KE = ½mv²
Answer: C. ΔG = ΔH − TΔS
Rationale: Gibbs free energy combines enthalpy and entropy into a
single quantity that predicts reaction spontaneity at constant temperature
and pressure.
A reaction is spontaneous when:
A. ΔG is positive.
B. ΔG is negative.
RECENT EXAM 2026|2027 ACTUAL COMPLETE REAL
EXAM QUESTIONS AND CORRECTLY WELL DEFINED
ANSWERS (VERIFIED ANSWERS) ALREADY GRADED
A+ | GUARANTEED SUCCESS!! NEWEST EXAM | JUST
RELEASED!!
Which thermodynamic property is a state function?
A. Heat
B. Work
C. Internal energy
D. Friction
Answer: C. Internal energy
Rationale: Internal energy depends only on the current state of a system,
not on the path taken to reach that state. Heat and work are path
functions because their values depend on the specific process involved.
Understanding the distinction between state and path functions is
fundamental in thermodynamics.
According to the First Law of Thermodynamics, energy:
A. Can be created.
B. Can be destroyed.
,C. Is conserved.
D. Exists only as heat.
Answer: C. Is conserved.
Rationale: The First Law of Thermodynamics states that energy cannot
be created or destroyed but can be transferred or transformed from one
form into another. This law forms the basis for energy balance
calculations in chemistry and engineering.
Which process typically has ΔH equal to zero for an ideal gas?
A. Isobaric process
B. Isochoric process
C. Isothermal process
D. Adiabatic process
Answer: C. Isothermal process
Rationale: The enthalpy of an ideal gas depends only on temperature.
During an isothermal process, the temperature remains constant,
resulting in no change in enthalpy.
The SI unit of pressure is:
A. Atmosphere
B. Torr
,C. Pascal
D. Bar
Answer: C. Pascal
Rationale: The pascal (Pa), equivalent to one newton per square meter,
is the SI unit of pressure. Other pressure units are commonly used but
are not the SI standard.
Which gas law states that pressure is inversely proportional to volume
at constant temperature?
A. Charles's Law
B. Boyle's Law
C. Gay-Lussac's Law
D. Avogadro's Law
Answer: B. Boyle's Law
Rationale: Boyle's Law states that pressure and volume have an inverse
relationship for a fixed amount of gas at constant temperature. As
volume decreases, pressure increases proportionally.
The standard enthalpy change for the formation of an element in its
standard state is:
A. 100 kJ/mol
, B. 1 kJ/mol
C. 0 kJ/mol
D. −100 kJ/mol
Answer: C. 0 kJ/mol
Rationale: By convention, the standard enthalpy of formation of a pure
element in its most stable form under standard conditions is assigned a
value of zero.
Which equation relates Gibbs free energy to enthalpy and entropy?
A. PV = nRT
B. q = mcΔT
C. ΔG = ΔH − TΔS
D. KE = ½mv²
Answer: C. ΔG = ΔH − TΔS
Rationale: Gibbs free energy combines enthalpy and entropy into a
single quantity that predicts reaction spontaneity at constant temperature
and pressure.
A reaction is spontaneous when:
A. ΔG is positive.
B. ΔG is negative.
