melting of wax is a physical change as burning of candle is a chemical change. Why????
plzz answer as fast as possible i 'll give thumbzz up
Melting of wax is a physical change because the state of matter (wax) is changed ( which is an indication of phy. change) and also we can reverse this
Burning of candle is chemical change because it involves melting of wax as well as formation of gas and production of heat and light which are indicators of chemical change and can 't be reversed.
Thanks and no need of thumbs up.
bcoz nothing new is produced in melting iof wx it is a reversible change .
but Burning of candle is chemical change as something new is produced in ths process nd this not reversible
vry vry ezy i read it in seventh
coz.. melt wax can again turn into solid form... But when there is burning of candle it envolved heat and it also makes carondioxide which can not be turned into solid form... remember that reversible is a physical change and irreversible is a chemical change ..
there will b a Ques in ur mind that If breaking of glass is irreversible then. why is it classiified as a physical reaction? Ans :- Coz.. it doesnt forn new substance or new product wid new properties....
If u hav satisfied ith my ans then thumbzz up plzzzz.....
is tearing of paper reversible
melting of wax is physical change