Question

the calorific value of wood is 18,000 kj per kg .How much amount of heat energy is liberated when 10kg of wood undergoes combustion.Find the heat energy in j

Answer 1

answer is in the photo
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Answer 2

calorific value of wood=18000 kj/kg
therefore, wood required to produce 108000 kj of heat= 108000/18000= 6kg of wood.
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