Irreversible because the ordered arrangement of molecules in the ice crystals is lost and the entropy increases. Irreversible because the ordered arrangement of molecules in the ice crystals is lost and the entropy increases.
If you simply re-freeze the ice cream liquid it will become a solid lump, so in that respect it is irreversible, however you can turn it back into a soft ice cream by freezing it in an ice cream maker, this makes smaller ice crystals and introduces air into the mix to make it soft and creamy again.
Yes, melting is reversible.
irrevesible
reversible!
Reversible
yes
No, it is not reversible as you can't get the ingredients to make the jelly back. Therefore it is an irreversible change. (first message on Answers.com.) This is what I thought originally as well; however, jelly is only a disolved into the water. It will change state to a solid when cooled, but, when heated, it will melt. If heated (slowly) the water will evaporate and leave the jelly crytals behind. Sort of like salty water. They might not look the same, but the water will return to its original state. Thus, jelly is a reversible change.
Melting ice cream is a physical change because it has the ability to go back to it's frozen form and be ice cream again. The chemical identity of it isn't changed.
Preparation of cream from milk is a physical process.
it is a physical change. there is no change in matter
physical
No, it is not reversible as you can't get the ingredients to make the jelly back. Therefore it is an irreversible change. (first message on Answers.com.) This is what I thought originally as well; however, jelly is only a disolved into the water. It will change state to a solid when cooled, but, when heated, it will melt. If heated (slowly) the water will evaporate and leave the jelly crytals behind. Sort of like salty water. They might not look the same, but the water will return to its original state. Thus, jelly is a reversible change.
Yes, the icecream can be frozen again.
No
Yes it is
Yes it is
It is a physical change.
Melting ice cream is a physical change because it has the ability to go back to it's frozen form and be ice cream again. The chemical identity of it isn't changed.
It is a physical change. :D
Preparation of cream from milk is a physical process.
This is a physical change.
by change the speed of blender
It is a physical change.