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There are many different kinds of chemical reactions, which involve many different kinds of chemical changes. All of these changes are observable, but some are more easily observable than others. Fire is an example of a chemical change that is extremely obvious and easily observed. When a piece of wood burns, it is changed into ash, as well as gases which are temporarily visible in the form of flame. We observe a dramatic change in temperature, since fire produces a lot of heat. Solid logs can be turned into gaseous carbon dioxide and water vapor, along with ashes and various other combustion products. But fire is not the only kind of chemical reaction. You can take two transparent aqueous solutions, mix them together, and have a chemical reaction take place that is invisible to the eye, but which can be analysed with various tests or equipment. One protein can be transformed into another protein, and both types of protein can look exactly the same. Chemical identity can be very subtle. Some chemical reactions involve visible changes of color, but most do not. Chemical reactions can produce lots of heat, or very little heat (but with a sensitive thermometer, you can detect even small changes in temperature). Chemical reactions can cause a change of phase (as from solid to gas) but they usually don't. Chemical reactions can alter solubility, so that an insoluble product is formed, which as a result causes a visible precipitate. There are many other possible results of a chemical reaction.
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What is one of the signs that a change is a chemical change?
One sign that a change is a chemical change is the production of gas, which may be observed as bubbles or odors. Other indicators can include a change in color, the formation of a precipitate, or a release or absorption of heat. These changes indicate that new substances are being formed, distinguishing chemical changes from physical changes.
Is sugar burning in a pan chemical or physical change?
Burning Sugar is a chemical change. Burning or oxidization is always a chemical change. The process takes in Oxygen and Sugar and outputs different compounds including water, carbon dioxide, carbon monoxide, and other carbon residue. Explanation 2: Chemical changes are changes in what things are made out of. Physical changes are like ice melting ice and liquid water are still water one is a solid but the other is liquid. steam is a gas but is still water. these changes do not change what water is.
Which one is a chemical change distillation filtration oxidation and electrolysis?
There are two chemical changes in this series. Oxidation always involves chemical change. Electrolysis does too.
What is a non example of chemical changes?
non example of chemical change: one non example is ice. ice is NOT an example of chemical change.
What is a kind of chemical change?
Burning wood is a chemical change because the chemical makeup changes through the addition of heat. wood + heat = ash and other gases Pretty much when one substance changes into another substance and the change is irreversible, it is a chemical change.
What is one of the signs that a change is a chemical change?
One sign that a change is a chemical change is the production of gas, which may be observed as bubbles or odors. Other indicators can include a change in color, the formation of a precipitate, or a release or absorption of heat. These changes indicate that new substances are being formed, distinguishing chemical changes from physical changes.
What is the different of physical change to chemical change?
A physical change is one where just the appearance of something changes and a chemical change is where the genetic makeup of something changes.
What is the change of one substance into another substance?
A change from one or more substances to another is a chemical change.
What can indicate a physical or chemical change?
Physical changes can be indicated by changes in appearance, texture, size, or state of matter without altering the chemical composition. Chemical changes, on the other hand, can be indicated by the formation of new substances, changes in color, temperature, odor, or the production of gas.
Chemical change is what?
A process in which reactants are changed into one or more different products
What is one way that a chemical change can happen in a household?
Cooking involves chemical changes.
What is the difference between a phisical change and a chemical change?
A physical change is one you can see. It changes the size, shape, or color of something. A chemical change is one that changes the composition of something. Basically, when a substance is changed into a different substance.
Is Burning sugar physical or Chemical change?
Burning Sugar is a chemical change. Burning or oxidization is always a chemical change. The process takes in Oxygen and Sugar and outputs different compounds including water, carbon dioxide, carbon monoxide, and other carbon residue. Explanation 2: Chemical changes are changes in what things are made out of. Physical changes are like ice melting ice and liquid water are still water one is a solid but the other is liquid. steam is a gas but is still water. these changes do not change what water is.
What is one major difference in a physical change and a chemical change is?
Physical change, changes the appearance or the surface. Chemical change, changes the minerals inside the object. Physical deals with the appearance and the surface. Chemical changes the structure of the minerals inside the object.
Is sugar burning in a pan chemical or physical change?
Burning Sugar is a chemical change. Burning or oxidization is always a chemical change. The process takes in Oxygen and Sugar and outputs different compounds including water, carbon dioxide, carbon monoxide, and other carbon residue. Explanation 2: Chemical changes are changes in what things are made out of. Physical changes are like ice melting ice and liquid water are still water one is a solid but the other is liquid. steam is a gas but is still water. these changes do not change what water is.
What criteria are used to distinguish between a chemical and physical change?
One distinguishing feature between physical and chemical changes is that a physical change can be reverse or turn back to its original form, but chemical change cannot be return to its form because the material change.
What are the changes that may accompany a chemical changes?
- a change in color -a change in odour -bubbling -a change of state (eg. solid to liquid, gas to liquid, etc.) either one or a combination of these things can indicate a chemical change.
