Question

why decomposition of sugar on heating is an irreversible change?

Answer 1

Explanation:

Heating sugar melts it from solid to liquid state and it is a physical change. This change is reversible and does not involve formation of any new substances. ... The change is irreversible and is thus a chemical change.

Answer 2

Answer:

. First of all we should recall what an irreversible change is. A change is called irreversible if it cannot be changed back again. In an irreversible change, new materials are always formed. Sometimes these new materials are useful to us. An irreversible change can be caused by:

• Heating

• Mixing

• Burning

• Dissolving

• Evaporating

Now let’s reflect on how and on which lines is the decomposition of sugar an irreversible change:

• Non-reversible

• It was heated

• Permanent change

• Colour change happens

• New product

Heating sugar melts it from solid to liquid state and it is a physical change. This change is reversible and does not involve formation of any new substances. The change is irreversible and is thus a chemical change

Explanation: