CHEMICAL THERMODYNAMICS: INTERMEDIATE TO ADVANCED
LEVEL EXAMINATION
CHEMICAL THERMODYNAMICS (CHM 401) FULL-LENGTH
EXAMINATION PAPER | UNIVERSITY CHEMISTRY FINAL EXAM |
EXAM QUESTIONS & ANSWERS | STUDY GUIDE | PAST PAPER
SECTION A: FUNDAMENTAL CONCEPTS AND LAWS OF THERMODYNAMICS
(Questions 1-25)
1. Which of the following statements correctly defines a thermodynamic system?
A) Any portion of the universe that is under consideration
B) The surrounding environment that interacts with the system
C) The boundary separating the system from surroundings
D) The total energy content of a closed container
Answer: A
2. The first law of thermodynamics is mathematically expressed as:
A) ΔU = q + w
B) ΔH = q_p
C) ΔG = ΔH - TΔS
D) ΔS = q_rev/T
Answer: A
3. For an isothermal reversible expansion of an ideal gas, the change in internal energy is:
A) Positive
B) Negative
C) Zero
D) Dependent on the pressure
Answer: C
4. Which thermodynamic property is a state function?
A) Work
,B) Heat
C) Internal energy
D) Path-dependent quantities
Answer: C
5. The entropy of a system increases when:
A) Heat is added reversibly at constant temperature
B) Work is done on the system
C) The system undergoes adiabatic compression
D) The temperature decreases
Answer: A
6. For an adiabatic process, which of the following is true?
A) q = 0
B) w = 0
C) ΔU = 0
D) ΔH = 0
Answer: A
7. The maximum work obtainable from a system operating between two reservoirs is given
by:
A) Carnot efficiency
B) Gibbs free energy
C) Helmholtz free energy
D) Entropy production
Answer: A
8. Which of the following is NOT a thermodynamic intensive property?
A) Temperature
B) Pressure
C) Volume
D) Density
Answer: C
9. The Clausius inequality states that:
A) ∮ dq_rev/T = 0
B) ∮ dq_irrev/T < 0
, C) ∮ dq/T ≤ 0
D) All of the above
Answer: D
10. For a spontaneous process in an isolated system, the entropy change is:
A) Negative
B) Zero
C) Positive
D) Not defined
Answer: C
11. The Gibbs-Helmholtz equation relates:
A) Gibbs free energy to temperature
B) Entropy to temperature
C) Internal energy to pressure
D) Enthalpy to volume
Answer: A
12. At equilibrium, the chemical potential of a component in different phases is:
A) Different
B) Equal
C) Proportional to concentration
D) Inversely proportional to temperature
Answer: B
13. The van der Waals equation of state corrects for:
A) Molecular volume and intermolecular forces
B) Temperature and pressure
C) Volume and entropy
D) Enthalpy and internal energy
Answer: A
14. The Joule-Thomson coefficient is defined as:
A) (∂T/∂P)_H
B) (∂P/∂T)_V
C) (∂V/∂T)_P
D) (∂H/∂T)_P
Answer: A
LEVEL EXAMINATION
CHEMICAL THERMODYNAMICS (CHM 401) FULL-LENGTH
EXAMINATION PAPER | UNIVERSITY CHEMISTRY FINAL EXAM |
EXAM QUESTIONS & ANSWERS | STUDY GUIDE | PAST PAPER
SECTION A: FUNDAMENTAL CONCEPTS AND LAWS OF THERMODYNAMICS
(Questions 1-25)
1. Which of the following statements correctly defines a thermodynamic system?
A) Any portion of the universe that is under consideration
B) The surrounding environment that interacts with the system
C) The boundary separating the system from surroundings
D) The total energy content of a closed container
Answer: A
2. The first law of thermodynamics is mathematically expressed as:
A) ΔU = q + w
B) ΔH = q_p
C) ΔG = ΔH - TΔS
D) ΔS = q_rev/T
Answer: A
3. For an isothermal reversible expansion of an ideal gas, the change in internal energy is:
A) Positive
B) Negative
C) Zero
D) Dependent on the pressure
Answer: C
4. Which thermodynamic property is a state function?
A) Work
,B) Heat
C) Internal energy
D) Path-dependent quantities
Answer: C
5. The entropy of a system increases when:
A) Heat is added reversibly at constant temperature
B) Work is done on the system
C) The system undergoes adiabatic compression
D) The temperature decreases
Answer: A
6. For an adiabatic process, which of the following is true?
A) q = 0
B) w = 0
C) ΔU = 0
D) ΔH = 0
Answer: A
7. The maximum work obtainable from a system operating between two reservoirs is given
by:
A) Carnot efficiency
B) Gibbs free energy
C) Helmholtz free energy
D) Entropy production
Answer: A
8. Which of the following is NOT a thermodynamic intensive property?
A) Temperature
B) Pressure
C) Volume
D) Density
Answer: C
9. The Clausius inequality states that:
A) ∮ dq_rev/T = 0
B) ∮ dq_irrev/T < 0
, C) ∮ dq/T ≤ 0
D) All of the above
Answer: D
10. For a spontaneous process in an isolated system, the entropy change is:
A) Negative
B) Zero
C) Positive
D) Not defined
Answer: C
11. The Gibbs-Helmholtz equation relates:
A) Gibbs free energy to temperature
B) Entropy to temperature
C) Internal energy to pressure
D) Enthalpy to volume
Answer: A
12. At equilibrium, the chemical potential of a component in different phases is:
A) Different
B) Equal
C) Proportional to concentration
D) Inversely proportional to temperature
Answer: B
13. The van der Waals equation of state corrects for:
A) Molecular volume and intermolecular forces
B) Temperature and pressure
C) Volume and entropy
D) Enthalpy and internal energy
Answer: A
14. The Joule-Thomson coefficient is defined as:
A) (∂T/∂P)_H
B) (∂P/∂T)_V
C) (∂V/∂T)_P
D) (∂H/∂T)_P
Answer: A
