question_answer

                                                                        In an experiment, 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.        

Answer:

   Given: Mass of fuel = 4.5 kg                                                                                                                                                          The heat produced by combustion of 4.5 kg of fuel \[=\text{ }1,\text{ }80,\text{ }000\text{ }kJ\] So, the calorific value of fuel = Heat produced by combustion of 1 kg of fuel                                                 \[=\,\,\frac{1,\,80,\,000}{4.5}\] \[=40,000\text{ }kJ/kg.\]