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Is it chemical or physical change if you leave your bicycle out in the rain and it rusts?
Wiki User
∙ 9y ago
Chemical, as rust is iron oxide. The iron is turning from iron to iron oxide, which (as you can see) is a chemical change. In general, a colour change usually indicates a chemical change.
Wiki User
∙ 9y ago
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What does physical and chemical change have in common?
A physical change to an object is a change in properties not involving the chemical makeup. In other words, a physical change is any change you can make to an object without changing the actual substance. (I.e. state of matter, size, shape, color . . .etc.) A chemical change is a change that forms a new substance through a chemical reaction. A chemical reaction is often signaled by bubbling or fizzing, but the only real way to prove a chemical reaction is by coming up with a new substance. So physical changes leave you with the same substance (slightly altered in appearance/texture etc.), but chemical reactions give you a new substance.
What kind of change occurs when salt dissolves in water chemical or physical?
Dissolution, meaning dissolving into a liquid form. It is a chemical reaction that begins with water covering a corner of the salt. The corner chlorine starts to leave the crystal and water bonds form. As the chlorine leaves more water molecules are left behind. The chlorine becomes fully solvated then the salt does the same.
Is mixing sugar in water a physical change or a chemical change?
ANSWER:A physical change. Nothing new is made from the solution and they both can be separated later by using heat to evaporate the water, leaving the sugar behind.
Is souring milk a physical or chemical change Why or why not?
It's a chemical change. The smell is the giveaway; a smell that wasn't there before is often an indicator of a chemical change. Also, the rate at which the milk sours can be changed by heat. For example, milk in the refrigerator is actually undergoing this souring reaction at all times, but the lower temperature inside the refrigerator slows it down so that it takes many days. But if you leave it outside the refrigerator, it will sour much more quickly - in a matter of hours. An increase in heat, therefore, quickens the reaction rate. This would not be the case in a physical change.
Why is Wood burns to form black charcoal a chemical change?
It changes properties.Physical Changes:Physical changes are changes in the appearance but not in the chemical properties. Some physical changes can be undone so the item can be put back to almost its past form.Chemical Changes:Chemical changes are the changes in chemical properties. Chemical changes also change in appearance and/or leave behind traces to prove that a chemical change occurred. Chemical changes create a new substance when they happen, e.g., cooking an egg. Chemical changes cannot be undone as the molecules, patterns and properties have been changed.How to tell them apart:The way to tell the difference between chemical and physical changes is by the changes that it went through. There may be clues that a chemical change appeared because of sound, light, gas production or an odour. A physical change does not involve any of these.
If you leave an orange out for days and there is nothing but the juice is dry will that be a chemical physical change?
Chemical change.
Is a leave changing color a physical change or chemical?
I think it is a physical change because if it's a chemical change it would be a whole new substance but it's only a change of color. Re: No it can't be a physical change because it's irreversible. There is a chemical reaction occurring in the leaves, so it should be a chemical change.
If you leave milk in the refrigerator for too long it begins to go sour. Is this an example of physical or chemical change?
This is a chemical change.
Dissolving table salt in water a chemical or physical change?
i think its a phyiscal change cause wen u leave it outside to evaporate u can still get the salt out
What type of change is it when you leave a bolt outside and it becomes rusty chemical physical phase or environmental?
this is a lame website !!
Is evaporating sea water to leave salt physical or chemical?
chemical
What does physical and chemical change have in common?
A physical change to an object is a change in properties not involving the chemical makeup. In other words, a physical change is any change you can make to an object without changing the actual substance. (I.e. state of matter, size, shape, color . . .etc.) A chemical change is a change that forms a new substance through a chemical reaction. A chemical reaction is often signaled by bubbling or fizzing, but the only real way to prove a chemical reaction is by coming up with a new substance. So physical changes leave you with the same substance (slightly altered in appearance/texture etc.), but chemical reactions give you a new substance.
Is old ham in the refrigerator a chemical change or physical change?
When ham get "old" (ie rots or degrades), it undergoes both a chemical and a physical change. Microbes break down the meat into energy they can use and in turn leave their metabolic wastes (ie a biochemical change). When a person notices a ham after it has been sitting on a shelf for several week, that person will notice that the color, shape, smell, and taste (if they are brave) of the ham has changed. Thus the changes are both chemical and physical
A physical change differs from a chemical change in that waste products are formed through chemical changes?
Not necessarily. This only happens in decomposition reactions, where energy reacts to break apart a compound. In, say, a synthesis reaction, sodium and chlorine combine, but don't leave a waste product. A physical change differs from a chemical change in that the product is the same substance, while in a chemical change it forms a/some different substance. Think about ripping a sheet of paper-is it still paper? If you burn the sheet of paper-is it still paper
If you leave your bicycle in the rain what does it become?
If you leave your bicycle in the rain it becomes a wet bicycle, or possibly a wet, rusty bicycle. I hope that was the answer you were looking for.
What kind of change occurs when salt dissolves in water chemical or physical?
Dissolution, meaning dissolving into a liquid form. It is a chemical reaction that begins with water covering a corner of the salt. The corner chlorine starts to leave the crystal and water bonds form. As the chlorine leaves more water molecules are left behind. The chlorine becomes fully solvated then the salt does the same.
Are separations of mixtures physical or chemical changes?
Physical. Salt water is a mixture, and you can separate it into NaCl and H2O simply by evaporating the water. As long as it does not change the chemical composition of the molecules, it is a physical change.
