Free Energy and Work Function Quiz Online Practice Test

1. What is the standard equilibrium constant for a reaction with a standard free energy change of 1.546 kJ/mol at 500°C?

antilog (0.105)

antilog (-0.105)

antilog (0.241)

antilog (-0.241)

2. What is the standard free energy of formation for NO_(g)?

84.8 kJ/mol

86.8 kJ/mol

88.8 kJ/mol

90.8 kJ/mol

3. In thermodynamics, the expression R ln K_P^o represents which of the following?

– ∆G

– ∆G^o

– ∆G/T

– ∆G^o/T

4. If 1 gram of kerosene releases 46.0 kJ of heat upon combustion, what temperature can 0.25 grams of kerosene raise 75 cm³ of water from 25°C to?

61.6°C

46.0°C

66.1°C

64.0°C

5. Which statement about entropy is incorrect?

S (monoclinic) > S (rhombic)

C (diamond) > C (graphite)

H₂O_(g) > H₂O_(l)

O_3(g) > O_2(g)

6. Which of the following compounds has the highest bond dissociation enthalpy?

HCl

HBr

7. Which statement is true for an ideal gas undergoing isothermal expansion?

Enthalpy decreases

Entropy decreases

Enthalpy remains constant

Entropy remains constant

8. In a spontaneous process, the change in the Gibbs function corresponds to:

The heat content of the system

Entropy change of the system

Work of expansion

Useful work

9. Which of the following is classified as an extensive property?

Surface area

Pressure

Molar volume

Concentration

10. Identify the state function from the following options:

q_rev/T

11. Determine the spontaneity of the following reaction at 127°C: N₂(g) + 3H₂(g) → 2NH₃(g), with ΔH = 92.22 kJ/mol and ΔS = -198.75 J/K·mol.

It is spontaneous

It is not spontaneous

It may be spontaneous

Spontaneity cannot be predicted

12. Calculate the Gibbs free energy change for the conversion of ATP to ADP at 293 K, given that the enthalpy change is 19.07 kcal and the entropy change is 90 cal/K.

7.3 cal

-5.3 kcal

7.3 kcal

-7.3 kcal

13. Given a reaction with an entropy change of 2.4 cal/K and a Gibbs free energy change of 3.4 kcal, calculate the change in enthalpy at 20°C.

3.4 kcal

3.4 cal

3.4 kJ

3.4 J

14. Which type of reaction is exemplified by the melting of ice into liquid water?

Endergonic

Exergonic

Exothermic

Endothermic

15. Which of the following processes does not qualify as an exergonic reaction?

Formation of table salt from sodium and chlorine

Combustion reactions

Chemiluminescence

Photosynthesis

16. Under which condition is the Gibbs free energy positive when both the change in enthalpy and the change in entropy are positive?

High temperatures

Low temperatures

All temperatures

Only at 0 Kelvin

17. What is the Gibbs free energy change for the conversion of oxygen to ozone at room temperature, given that K_p2.47 x 10^-29.

163 kJ/mol

163 J/mol

163 kJ

163 k/mol

18. In the equation ΔG = – 2.303 RT logK what does the variable K denote?

change in temperature

kelvin

equilibrium constant

change in enthalpy

19. How is Gibbs free energy related to the electromotive force (EMF) of a cell?

ΔG = -nFE_cell

ΔG = -nF E_cell

ΔG = -n E_cell

ΔG = -nF E_cell

20. What is the equivalent of 1 Faraday in coulombs?

96,500 C

95,600 C

9,560 C

9,650 C

Test Name:	Free Energy and Work Function Quiz
Subject Category:	Chemistry
Test Type:	Multiple Choice Questions
Total Score / Questions:	20 / 20
Time Allowed:	10 Min
Who Should Practice this Test:	Students, job seekers, or professionals preparing for competitive exams and interviews.

Free Energy and Work Function Quiz Online Practice Test

Free Energy and Work Function MCQ Quiz Online Practice Test

Related Practice Tests: