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Which of thfollowing equations corresponds to theenthalpyofcombustionat298K:-

  1. C2H6(g)+7/2O2(g)→2CO2(g)+3H2O(g)    
  2. C2H6(g)+7O2(g)→4CO2(g)+6H2O(g)    
  3. C2H6(g)+7/2O2(g)→2CO2(g)+3H2O(ell)    
  4. C2H6(g)+7O2(g)→4CO2(g)+6H2O(ell)    

The correct answer is: C2H6(g)+7/2O2(g)→2CO2(g)+3H2O(ell)

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