Indian Navy INET Thermodynamics — practice questions

Explore 3 free Thermodynamics questions in Indian Navy INET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Thermodynamics questions and exercises with answers

Showing questions 1–3 of 3.

As per your syllabus, in CH₄ atomisation requires 1665 kJ/mol. What is the MEAN C-H bond enthalpy?Read the answer and worked solution →As per your syllabus, the bond enthalpy of N≡N triple bond is which value — among the highest known for diatomics?Read the answer and worked solution →Match the thermodynamic quantity to its symbolRead the answer and worked solution →

Worked practice questions

As per your syllabus, in CH₄ atomisation requires 1665 kJ/mol. What is the MEAN C-H bond enthalpy?

416 kJ/mol (≈ 1665 / 4)
427 kJ/mol
100 kJ/mol
1665 kJ/mol

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Correct answer: A. 416 kJ/mol (≈ 1665 / 4)

As per your syllabus, mean C-H = Δ_a H°/4 = 1665/4 ≈ 416 kJ/mol. Individual successive C-H bond dissociations differ (427, 439, 452, 347).

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As per your syllabus, the bond enthalpy of N≡N triple bond is which value — among the highest known for diatomics?

741 kJ/mol
435 kJ/mol
498 kJ/mol
946 kJ/mol

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Correct answer: D. 946 kJ/mol

As per your syllabus, N≡N = 946 kJ/mol (very strong; reason N₂ is inert). O=O 498, C=O 741, H-H 435.

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Match the thermodynamic quantity to its symbol

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Matching pairs

Left
Enthalpy
Right
H
Left
Entropy
Right
S
Left
Gibbs free energy
Right
G
Left
Internal energy
Right
U
Left
Helmholtz free energy
Right
A

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