A: Calculate ΔHrxn 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 ΔH1 anduse this value in your calculations to solve for this problem.***
Answer & Explanation
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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
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