Question

II. Define these terms:
1. Combustion
2. Ignition temperature
3. Calorific value of a fuel​

Answer 1

Answer:

1. Combustion is an oxidation reaction. For the reaction to take place, a fuel and an oxidant should be there. Substances undergoing the combustion are known as fuels whereas in burning oxygen combines with another molecule to produce an oxide.
2. The lowest temperature at which a substance catches fire and undergoes combustion liberating heat and light is called ignition temperature.
3. Calorific value is basically a measurement of energy or heat released (kJ or kcal) when 1kg of coal is completely combusted in the presence of air or oxygen.

Answer 2

Question ⤵️

II. Define these terms:

1. Combustion

2. Ignition temperature

3. Calorific value of a fuel

Answer ⤵️

1) Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke.

2) Ignition Temperature

Ignition temperature is an important property of any fuel because the combustion reaction of the fuel becomes self-sustaining only above this temperature.

3) 3 Calorific value. The calorific value of a fuel is the number of heat units evolved when unit mass (or unit volume in the case of a gas) of a fuel is completely burned and the combustion products are cooled to 298 K.

Hope it helps you ✌️

Explanation:

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