Question

calorific value of wood is 18000 kj how much wood is required to produce heat energy of 108000 kj

Answer 1

wood required to produce heat energy= 108000/18000=6 wood are required

Answer 2

by calorific value of wood = 18000 kJ we mean that
1 gram of wood can produce that much heat.

so in order to produce 108000 kJ of heat let the amount of wood required be X.
so,

X = 108000 / 18000
X = 6g

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