Question

When coal burn, it ash behind. Ash so produced is lighter than the coal which has burnt. Justify the decrease in mass in the light of law of conservation of mass.​

Answer 1

Answer:

It shows that when wood burns, it combines with oxygen and changes not only to ashes, but also to carbon dioxide and water vapor. The gases float off into the air, leaving behind just the ashes. Suppose you had measured the mass of the wood before it burned and the mass of the ashes after it burned.

Answer 2

When wood consumes, it joins with oxygen and changes not exclusively to remains yet additionally to carbon dioxide and water fume.

Why is it so?

• The gases float off high up, abandoning only the cinders.
• Assume we had estimated the mass of the wood before it was consumed and the mass of the remains after it was consumed.
• The law of conservation of mass expresses that, for any shut framework, the mass of the framework should stay consistent.
• In this way, at the end of the day, mass can't be made nor obliterated.
• In a consuming log, the underlying mass of the wood and the cinders that are abandoned after it consumes are unique, which would appear to disregard the law of protection of mass.
• Nonetheless, the remainder of the mass is as $CO_{2}$ and $H_{2} O$ which were additionally created as the log consumed.

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