Gce Model Questions Vol1 2025 Chemistry Question 3
Practice objective / multiple choice question 3 from the 2025 Gce Model Questions Vol1 Chemistry examination.
Using bond enthalpies, calculate the standard enthalpy change for the reaction \( \mathrm{C(s,\,graphite) + 2\,H_2(g) \rightarrow CH_4(g)} \). Given: sublimation enthalpy of graphite \( \Delta H_{\text{sub}} = +716\ \text{kJ\,mol}^{-1} \); H-H bond enthalpy = 436 kJ mol⁻¹; C-H bond enthalpy = 413 kJ mol⁻¹. Show all steps.
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This is Gce Model Questions Vol1 2025 Chemistry Question 3. It is one of the objective questions from the 2025 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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