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The heat of combustion of carbon to CO₂ is -393.5 kJ/mol. The heat released upon formation of 35.2 g of CO₂ from carbon and oxygen gas is
Options
(a) 315 kJ
(b) -630 kJ
(c) -3.15 kJ
(d) -315 kJ
Correct Answer:
315 kJ
Explanation:
Given: C + O₂ → CO₂, ΔH = – 393.5 kJ/mol. Amount of heat realeased on formation of 44 g CO₂ = 393.5 KJ. Amount of heat released on formation of 35.2 g CO₂ = 393.5 / 44 * 35.2 = 314.8 ≈ 315 kJ.
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Topics: Thermodynamics
(179)
Subject: Chemistry
(2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Transition elements
- Which of the following can possibly be used as analgesic without causing
- The percentage weight of Zn in white vitriol [ZnSO₄ 7H₂O] is approximately equal
- How many edta molecules can surround calcium
- Standard entropies of X₂, Y₂ and XY₃ are 60, 40 and 50 J K⁻¹ mol⁻¹ respectively.
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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