Question

In an experiment 15 kg of a fuel was completely burnt. The heat produced was measured to be 255000 kJ. calculate the calorific value of the fuel.

Answer 1

Answer:

• Calorific value of fuel is 17000 kJ/kg.

Explanation:

Given:

• Mass of fuel burnt, m = 15 kg
• Heat produced on burning 15 kg fuel, E = 255000 kJ

To find:

• Calorific value of fuel, CV =?

Knowledge required:

• Calorific value of a fuel is known as the amount of heat produced by the complete combustion of 1 kg of that given fuel.

• Calorific value is generally expressed in unit kJ/kg .

• Calorific value of fuel = Total heat produced on burning / mass of fuel burnt

Calculation:

Using formula

→ Calorific value of fuel = Heat produced on burning / mass of fuel burnt

→ CV = (255000 kJ) / ( 15 kg )

→ CV = 17000 kJ/kg

Therefore,

• Calorific value of the fuel is 17000 kJ/kg.

Answer 2

Answer:

✡ Given ✡

$\leadsto$ In an experiment 15 kg of a fuel was completely burnt. The heat produced was measured to be 255000 kJ.

✡ To Find ✡

$\leadsto$ What is the calorific value of the fuel.

✡ Solution ✡

Given:-

✏ Total mass of fuel = 15 kg

✏Total heat produced = 255000 KJ

▶ According to the question,

✴ Heat produced by 15 kg of fuel = 255000 kJ

Therefore, Heat produced by 1 kg of fuel,

$\implies$ $\dfrac{255000}{15}$ × 1 KJ/Kg

$\implies$ 17000 KJ/Kg

$\therefore$ The calorific value of the fuel is 17000 KJ/Kg

Explanation:

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