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Coal and Its Fomation

The calorific...

Question

The calorific value of a substance is 4.2x10 to the power 5 kj/kg. How much heat will be produced when9.3x10 to the power 6 mg of the fuel is burnt?

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Solution

mass of fuel $=$ 9 $\cdot$ 3 $\times$ 10⁶mg $=$ 9 $\cdot$ 3Kgs
Calorific value $=$ 4 $\cdot$ 2 $\times$ 10⁵KJ $/$ Kg
Heat produced when 9.3Kg of fuel is burnt $=$ 9 $\cdot$ 3 $\times$ 4 $\cdot$ 2 $\times$ 10⁵ $=$ 39 $\cdot$ 06 $\times$ 10⁵KJ

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