Question

which one of the step while burning a candle is not reversible ​

Answer 1

The process of burning of wax is not reversible......

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Answer 2

Burning of the wick of the candle is an irreversible step while burning a candle.

• A candle has two main constituents, solid wax and wick.
• The wick is created of a material that is highly absorbent and catches fire quickly.
• The fire is applied to the wick of the candle, as soon as it catches the fire, it begins to burn and produce heat.
• This heat generated begins to melt the solid wax and gets transformed into the liquid wax
• This molten wax later solidifies into its initial state, when the heat flow stops.
• Therefore, the melting of wax is a reversible process.
• But the wick that burns is converted to vapours and it is not a reversible process.