SELECT * FROM question_mgmt as q WHERE id=6449 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=12 AND subId=16 AND chapterId=369 and ex_no='1' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 8th science Combustion and Flame in an experiment 4 5 kg of a fuel was completely b

Question:

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:

Mass of fuel = 4.5 kg

Heat produced = 180000 kJ

Calorific value = Total heat produced                                                                                                                                                                                                                              Total mass burnt

So, calorific value = 180000                                                                                                                                                                                                                                                   4.5

= 180000 x 10                                                                                                                                                                                                                                           45

= 40000 kJ/kg


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