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Definition of (gross or net) calorific value of a hydrocarbon compound and their relation with its...

Definition of (gross or net) calorific value of a hydrocarbon compound and their relation with its standard formation heat at 298K and C/H ratio.

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Answer #1

Gross calorific value- it is the value of heat released when a specific compound is combusted in presence of oxygen. It is also called as higher heating value. Mainly combustion condition taken at 25 degree centigrade.

Net calorific value - when we are substracting water heating value from the gross calorific value that value is called as net calorific value at 25 degree centigrade.

NCV = GCV - 0.09 *H*587

latent heat of water vapour = 587kcal/kg

NCV = GCV - latent heat of water vapor.

Heat of combustion Hc= heat of formation of reactant - heat of formation products.

C/H ratio is calculated from the reaction how many carbon involve in combustion completely. And find out co2 and water molecules having C and H.

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