How much energy will $1 k g$ mass of wood yield on complete combustion if its calorific value were $18 k J g^{- 1}$ ?

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Solution

STEP 1: Given data
Mass of wood, $m = 1 k g = 1000 g$
The calorific value of wood, $c = 18 k J g^{- 1}$
STEP 2: Calculate the energy yielded by a given mass of wood
Energy yielded on burning wood,
$E = m \times c E = 1000 \times 18 E = 18000 k J E = 18 M J$
Hence, the total energy yielded by burning $1 k g$ will be $18 M J$ .

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How much energy will 1kgmass of wood yield on complete combustion if its calorific value were 18kJg-1?

STEP 1: Given dataMass of wood, m=1kg=1000gThe calorific value of wood, c=18kJg-1STEP 2: Calculate the energy yielded by a given mass of woodEnergy yielded on burning wood, E=m×cE=1000×18E=18000kJE=18MJHence, the total energy yielded by burning 1kgwill be 18MJ.

How much energy will $1 k g$ mass of wood yield on complete combustion if its calorific value were $18 k J g^{- 1}$ ?