Indian Navy INET Thermal Properties of Matter — practice questions

Explore 2 free Thermal Properties of Matter questions in Indian Navy INET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Thermal Properties of Matter questions and exercises with answers

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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 →

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.