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Physical or Chemical Change
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Mickey
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Post: #1
Physical or Chemical Change
So in my biology class wee were discussing whether a baby gaining 10 pounds is a physical change or a chemical change. The definition of a chemical change in our books is "when the change made changes the substances and is irreversible". So I'm wondering, what does EP think this is?Hmmm

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(This post was last modified: 21/09/2008 07:54 AM by Mickey.)
21/09/2008 07:45 AM
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Kaiser
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RE: Physical or Chemical Change
MICk3Y Wrote:So in my biology class wee were discussing whether a baby gaining 10 pounds is a physical change or a chemical change. The definition of a chemical change in our books is "when the change made is irreversible". So I'm wondering, what does EP think this is?Hmmm

in my chemistry class, a Quimical Change is a change that involves modifying the chemical composition of the sustance,

but that is a physical one anyways because a baby can lose those 10 pounds...

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21/09/2008 07:49 AM
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Mickey
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RE: Physical or Chemical Change
Kaiser Wrote:
MICk3Y Wrote:So in my biology class wee were discussing whether a baby gaining 10 pounds is a physical change or a chemical change. The definition of a chemical change in our books is "when the change made is irreversible". So I'm wondering, what does EP think this is?Hmmm

in my chemistry class, a Quimical Change is a change that involves modifying the chemical composition of the sustance,

but that is a physical one anyways because a baby can lose those 10 pounds...

But those 10 pounds he loses probably wouldnt be the same ten pounds he gained, and some of the 10 pounds he gained would probably never be lost again
also yeah that also part of the definition, but i just included the part that confused me

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21/09/2008 07:53 AM
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Chroma
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RE: Physical or Chemical Change
It's physical. Chemical is like when you cook something. You can't un-cook it, but with a baby gaining weight, he/she/it can lose that weight

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21/09/2008 08:08 AM
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diego
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RE: Physical or Chemical Change
I say physical change. Biology For the loss, Physics For the win!

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21/09/2008 08:11 AM
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feinicks
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RE: Physical or Chemical Change
its a physical change. or more accurately, a Physio-Chemical This is so because the mass of the baby is due increase in the no. of individual mass particles (like cells).

If you want the exact co-relation of the physical-chemical reactions, then read on:

The Chemical change within the body of the baby (or any living being) would be among the various bio-chemical processes that are going on. Eg. Osmoregulation, digestion, respiration (I imply the Fe-Hb relationship here). A baby eating food would be a physical ativity, but the breakdown of the food to release glucose and conversion of the glucose to glycogen would be a chemical process. However, due to the chemical processes, a very predominant physical process takes place: Division and multiplication of cells. Each cell has an individual mass. The weight of the body is dictated by how much mass constitutes the physical body.

Hence gain/loss of weight is a Physical process.

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21/09/2008 08:15 AM
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SchmilK
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Post: #7
RE: Physical or Chemical Change
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This should pretty much sum up my answer

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21/09/2008 08:59 AM
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demonchild
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RE: Physical or Chemical Change
Its physical. If you can get it back, its physical.

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21/09/2008 09:07 AM
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feinicks
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Post: #9
RE: Physical or Chemical Change
by the way... chemical reactions are of two types..

irreversible- where the reactants are lost
reversible- where you can get them back from the product(s)

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21/09/2008 09:23 AM
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boogschd
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RE: Physical or Chemical Change
physical :D

lol @ physics For the win
21/09/2008 09:25 AM
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