How has the use of CNG in motor vehicles reduced pollution in big cities?Explain Calorific value of Cowdung is 7000kg. How much cowdung cakes are required to produce heat energy of 35000 J? Explain with steps.
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Answered by
66
1.CNG stands for compressed natural Gas and it is clean fuel as compared to diesel and petrol for the following reasons:
CNG emits lower regulated pollutant and toxins
CnG produces less green house effect gas. Petrol and diesel gives off oxides of nitrogen and sulphur which combine to form acid rain where as CNG does not .
2.Calorific value of cowdung is 7000kj/kg we mean that if 1kilogram of Cowdung is burnt completely, then it will produce 7000kilojoules of heat energy.
3.given:
Q=35000j
Heat produced by burning 1 kg of cowdung=7000kJ
so, 35000KJ of heat energy is produced in=35000/7000=5Kg of cow dung is required
CNG emits lower regulated pollutant and toxins
CnG produces less green house effect gas. Petrol and diesel gives off oxides of nitrogen and sulphur which combine to form acid rain where as CNG does not .
2.Calorific value of cowdung is 7000kj/kg we mean that if 1kilogram of Cowdung is burnt completely, then it will produce 7000kilojoules of heat energy.
3.given:
Q=35000j
Heat produced by burning 1 kg of cowdung=7000kJ
so, 35000KJ of heat energy is produced in=35000/7000=5Kg of cow dung is required
Answered by
68
Combustion of fuels like petroleum causes formation of un-burnt carbon particles along with carbon monoxide gas. These harmful pollutants enter the air and cause respiratory diseases. Compressed Natural Gas (CNG) produces these harmful products in very less quantity. It is a comparatively cleaner fuel. Therefore, the use of CNG has reduced pollution in our cities.
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