The heat of formation at 25oC of liquid acetone, CH3C(O)CH3(l) is -247.5 kJ/mol. Which of the following is the correct heat of formation reaction for CH3C(O)CH3(l) )?   3C(s,graphite)+3H2(g)+12O2(g)→CH3C(O)CH3(l)△Hof=−247.5kJmol 3C(s,graphite)+6H(g)+O(g)→CH3C(O)CH3(l)△Hof=−247.5kJmol CH3C(O)CH3(l)+4O2(g)→3CO2(g)+3H2O(g)△Hof=−247.5kJmol C3(s,graphite)+3H2(g)+12O2(g)→CH3C(O)CH3(l)△Hof=−247.5kJmol 6C(s,graphite)+6H2(g)+O2(g)→2CH3C(O)CH3(l)△Hof=−247.5kJmol

Chemistry: Principles and Practice
3rd Edition
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Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
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Chapter5: Thermochemistry
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Problem 5.51QE: The enthalpy change when 1 mol methane (CH4) is burned is 890 kJ. It takes 44.0 kJ to vaporize 1 mol...
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The heat of formation at 25oC of liquid acetone, CH3C(O)CH3(l) is -247.5 kJ/mol. Which of the following is the correct heat of formation reaction for CH3C(O)CH3(l) )?

 

  1. 3C(s,graphite)+3H2(g)+12O2(g)→CH3C(O)CH3(l)△Hof=−247.5kJmol
  2. 3C(s,graphite)+6H(g)+O(g)→CH3C(O)CH3(l)△Hof=−247.5kJmol
  3. CH3C(O)CH3(l)+4O2(g)→3CO2(g)+3H2O(g)△Hof=−247.5kJmol
  4. C3(s,graphite)+3H2(g)+12O2(g)→CH3C(O)CH3(l)△Hof=−247.5kJmol
  5. 6C(s,graphite)+6H2(g)+O2(g)→2CH3C(O)CH3(l)△Hof=−247.5kJmol
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