1) C 2 H 6 (g) C 2 H 4 (g) H 2 (g) H 1 2) C 2 H 6 (g) 3 5...

1) C2H6 (g) -----> C2H4 (g) + H2 (g) Î”H1 = ? 2) C2H6 (g) + 3.5O2 (g) ----->...

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Question

Chemistry

1) C₂H₆ (g) ----->C₂H₄ (g) + H₂ (g) Î”H₁ =?
2) C₂H₆ (g) + 3.5O₂ (g)-----> 2CO₂ (g) + 3H₂O (l) Î”H₂= -1558 kJ/mo
3) C₂H₄ (g) + 3O₂ (g) ----->2CO₂ (g) + 2H₂O (l) Î”H₃ = -1408kJ/mol
4) 2H₂O (l) -----> 2H₂ (g) +O₂ (g) Î”H₄ = 568 kJ/mol
A: Calculate Î”H_rxn for reaction (1) based onthe given data. Is this reaction endothermic orexothermic?
B: How muchheat is transferred between the system and the surroundings when 25grams of ethane (C₂H₆) decomposes to produceethylene (C₂H₄) and hydrogen gas? Is energyis released or absorbed by the system?
* Hint: You will need to calculate Î”H₁ anduse this value in your calculations to solve for this problem.*

Answer & Explanation Solved by verified expert

4.1 Ratings (582 Votes)

AAnswer 12 The reaction is an endothermic reaction becauseis positive ie 134 kJmolExplanation Given 1234first Multiply equation 2 by 25next reverse equation 3 and multiply by2Now add equation 4 5 and 6 7divide See Answer

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