Fuel ‘X’ has a calorific value of 50 kJ/g and produces carbon dioxide and water on combustion where as Fuel ‘Y’ has calorific value 35 kJ/g and produces oxides of sulphur and nitrogen on combustion. Which is a better fuel?

Fuel ‘X’ has a calorific value of 50 kJ/g and produces carbon dioxide and water on combustion where as Fuel ‘Y’ has calorific value 35 kJ/g and produces oxides of sulphur and nitrogen on combustion. Which is a better fuel? Correct Answer Fuel ‘X ‘is better than Fuel ‘Y’

The correct answer is Fuel ‘X ‘is better than Fuel ‘Y’.

Key Points

• Calorific value is the amount of heat energy present in food or fuel and which is determined by the complete combustion of specified quantity at constant pressure and in normal conditions.
• It is also called calorific power.
• The unit of calorific value is kilojoule per kilogram i.e. KJ/Kg.
• The efficiency of fuel or food mainly depends on the calorific value.
• If the value is high, its efficiency will also be high. If the value is low, its efficiency would also decrease.
• Calorific value is directly proportional to its efficiency. Hence, Fuel ‘X ‘is better than Fuel ‘Y’.