Tag: occurrence of carbon compounds in nature

Calorimeter is the instrument used to measure calorific value of heat produced by combustible substances. Junker's calorimeter is used to determine the calorific value of gaseous fuels.

Calorific value of these gases are listed in table
Gober gas $= $  $5kWh/Nm^3$
refinery gas $= $ $1.5kWh/Nm^3$
Converte gas$ = $ $3kWh/Nm^3$
Blast furnace gas $=$  $0.9kWh/Nm^3$

Gross & net calorific value is the same for L.D converter gas. Calorific value is the total quantity of heat liberated by the complete combustion of a unit mass of the fuel in air or oxygen. It is expressed in $kcal/m^3$ or British thermal unit (B.T.U) per cubic foot.

Calorific value: The amount of energy produced by the complete combustion of a material or fuel.
Coal gas $H _2+CO+CH _4$ has the highest calorific value.

The calorific value of a fuel is the quantity of heat produced by its combustion, at constant pressure and under STP conditions. It is mainly expressed in kcal/g.

Petrol has highest calorifc value among all.
Petrol-48,000kJ/kg
Coke-31,000kJ/kg
Natural gas-43,000kJ/kg
Kerosene-46,200kJ/kg

Petrol is the combustible fuel with high calorific value which is used for the running automobiles like car, motorcycles etc.

Higher the heating value or higher the calorific value better the fuel is, so kerosene has a higher heating value which is measured by bomb calorimeter.

 Calorific value is the quantity of heat produced by the complete combustion of a given mass of a fuel, usually expressed in joules per kilogram. It can be defined as the amount of heat energy produced on complete combustion of 1 Kg of fuel.

Energy released by 12 kg of LPG =  12 %$\times$ 50 kJ $= $ 600 kJ
$\therefore$ energy consumed per day
$\displaystyle \frac {600\,kJ}{30}\, =\, 20,000$ Joules/day.