What is the difference between a reversable and irriversable change?

Question

and so i get a better understanding could u also give an example because somtimes it gets confusing.

Thanks somuch

Answer 1

If a change occurs to any material  from any other material and again this may be returned back.this is reversible change.As for example ice may be changed to  water by absorption of latent heat and again water may be converted to ice by liberation of latent heat.If any conversion occurs but cannot returned back,this  is irreversable change. As for example ,if candle burns and converts to carbon di oxide and water vapour,but they can not be combined to convert to candle

Answer 2

Reversible is often physical, eg ice melting....it can be frozen again.

The production of ammonia in the Haber process is a reversible chemical change:

N2 + 3H2 <--> 2NH3

Reversible means it can be undone relatively simply.

An irreversible reaction is on which you cannot undo, like burning methane:  

CH4 + 2O2 --> CO2 + 2H2O

Answer 3

in reverseble reaction the product obtained can be changed again into the reactants but in irreversable reaction the product obtained can not be changed into reactants again.