when 1g of anhydrous oxalic acid is burnt at 25°C,the amount of heat liberated is 2.835kJ.Enthalpy change for combustion is

As per definition, Heat of Combustion of a substance is the heat liberated when 1 mole of the substance undergoes complete combustion with oxygen at constant pressure. 

molar mass of H2C2O4 is 90.03 g mol−1 (As per Wikipedia) 

1g of anhydrous oxalic acid is burnt at 25 °C , the amount of heat liberated is 2.835 kJ 
then when 90.03 g of anhydrous oxalic acid is burnt at 25 °C , the amount of heat liberated is 2.835*90.03= 255.23 kJ 

So heat of Combustion is 255.23 kJ/mole
  • 67
A]_255.15

  • 6
A cylinder consist either propylene or ethylene. 12ml of  gas required 54ml of oxygen for complete combustion.The gas is
  • 4
What are you looking for?