What is the calorific value?

Important Questions on Combustion and Flame

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Which fuel has the highest calorific value?

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Define calorific value of a fuel.

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

What is the calorific value of a fuel?

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Which of the following fuels has the highest calorific value?

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

5 kg of a fuel produces 320,000 kJ of heat energy on complete combustion. Calculate the calorific value of fuel.

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

The fuel having a calorific value of $55 \frac{\mathrm{kJ}}{\mathrm{g}}$ is likely to be:

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Define the term:
The calorific value of a fuel.

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Define the calorific value of a fuel.

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

The calorific value of cooking gas (LPG) is $50 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$. What does it mean?

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

The calorific values of five fuels A, B, C, D and E are given below:
Which of the fuels could be: (i) cooking gas (ii) alcohol (iii) wood (iv) hydrogen (v) kerosene?
A         $48 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$
B        $17 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$
C        $150 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$
D         $50 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$
E         $30 \mathrm{k}\mathrm{J} {\mathrm{g}}^{-1}$

MEDIUM

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Arrange the following fuels in the order of decreasing calorific values (keeping the fuel with highest calorific value first).
Biogas, Kerosene, Wood, Petrol, Hydrogen gas, Methane

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

What is the calorific value of a fuel?

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Science>Chemistry>Combustion and Flame>Fuel Efficiency

Why is LPG considered a good fuel?

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Calorific value of cowdung cakes is 7000 kJ/kg. How much cowdung cakes are required to produce heat energy of 35000 kJ ?

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

In an experiment 4.5 kg of a fuel was completely burnt. The heat produced was measured to be 180,000 kJ. Calculate the calorific value of the fuel.

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Arrange the following fuels in the order of increasing calorific values (keeping the fuel with lowest calorific value first):
LPG, Coal, Alcohol, Dung cakes, Diesel

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

The fuel having the lowest calorific value is:

MEDIUM

Science>Chemistry>Combustion and Flame>Fuel Efficiency

The Calorific value of LPG is $55000\mathrm{K}\mathrm{J}/\mathrm{K}\mathrm{g}$, what does it mean?

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Name the unit in which the calorific value of a fuel is expressed.

EASY

Science>Chemistry>Combustion and Flame>Fuel Efficiency

Which of the following produces more heat (per unit mass) on burning? Coal or LPG.