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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
- For the cell reactionCu²⁺ (C₁.aq) + Zn(s) = Zn²⁺(C₂.aq ) + Cu(s)
- In third group, iron gives blood red colouration with ammonium thiocyanate
- If pH value of a solution is 3 and by adding water, it becomes 6,
- Position of hydrogen in periodic table is such that it can be placed in
- The amount of energy,which is released due to the addition of extra electron
Topics: Thermodynamics (179)
Subject: Chemistry (2512)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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