ID:185829
 Oct 19 2005, 2:46 pm
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Chemical or physical change?
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I would assume chemical, as it's an explosion, no? Then again, the particles could just be spread out, instead of an explosion happening, in that case it would be physical.
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I think it's chemical, but I'm not sure.
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I dont know which category to put it in on my poster. The explosion is a combustion which fits into Chemical,But the star dies and makes new stars + it spreads out. o.O
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I would still consider it chemical, because even in a regular explosion, bits and pieces from whatever exploded can separate (and usually will) and form new masses, but the reaction itself would still be chemical.
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Neither. The definition of physical change or chemical change doesn't apply.
There isn't a chemical reaction of any sort - it is, in fact, a nuclear explosion. So stuff just gets thrown out - obviously physical. BUT, because it is a nuclear reaction, some atoms get turned into atoms of other elements. Not easily reversible, but probably not chemical. Is that physical? In short, I would argue that it is neither. But, if pressed, it's a physical change as there is no chemical reaction. | |
There is no chemical reaction in a supernova.
It is exactly the same as a giant nuclear weapon. There isn't a chemical reaction when they explode, either. | |
Jp's right...
A Physical change would be something's form being altered... Whether this be shape, size, location, even state (gas, liquid, solid)... A Chemical change is a combination (or destruction) on the molecular level... Atoms in a molecule are either torn apart, or added to with other elements (to form new compounds)... There is a third kind of change, Nuclear, to describe things like a Supernova... These are changes that occur on the atomic level... The very atoms that make up the substance are being altered by this change... So, if you want to classify a Supernova, you need a third group... http://www.unit5.org/christjs/Phase_Change_Nuclear.htm | |
Exactly... The violent outburst of matter is not caused by chemical combustion, it is caused by the immense amounts of energy released by the nuclear reaction...
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Sorry, what?
*edit*
Copying what GDT is talking about, I'm...uh, I'd say a super nova was...um.
Could you clarify the question a bit more?