Question

Define Flame in detail......

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Answer 1

A flame is the hot thing you can see when combustion takes place.The flame is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma.Generally, the color of a flame may be red, orange, blue, yellow, or white, and is dominated by blackbody radiation from soot and steam.

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Answer 2

Answer:

Introduction to candle flame concept tells about the components and structure of flame. Candles produce light by releasing heat and all the turn on the candle produces come from a chemical reaction known as combustion in which wax reacts with oxygen in the air to produce carbon dioxide. The substances that vaporize while burning produces the flame. Kerosene oil and molten wax are the two substances that are responsible for producing flame while burning. Flame is defined as the area of combustion of a combustible substance. Substances that do not vaporize during burning, do not produce the flame.

Candle Flame

Structure of candle flame

In a general candle, flame colour depends on three factors:

Nature of the substance that undergoes combustion

Amount of oxygen and

Temperature

There are two types of flames:

Non-luminous flame and

Luminous flame

Luminous flame Non-luminous flame

Incomplete combustion Complete combustion

Colour – Bright yellow Colourless

Insufficient amount of oxygen Presence of sufficient oxygen

Provides light Hotter

In a candle flame, a quarter of the energy created is released as heat.

A candle flame consists of three different zones. Each zone has different temperatures. Every zone has different colour and this will help us in understanding the temperatures of each zone.

The first zone is called the Outer zone

The second zone is called the Middle zone

The third zone is called as Inner zone

Due to complete combustion, the outer zone is blue. This zone is the hottest in temperature when compared to the other zones. This blue coloured zone is the non-luminous part of the flame.

The yellow colour region which is the bright part of the flame is the middle zone. It is moderately hot and partial combustion of fuel takes place.

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