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IfC6H12O6(s)+9O2(g)→6CO2(g)+6H2O(g); ΔH=680Kcal Thweight oCO2(gproduced when170Kcal oheat is evolved in the combustion

  1. Alwaypositive    
  2. Alwaynegative    
  3. Numerically equal to thheat oformation    
  4. 1and3    

The correct answer is: Alwaynegative


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