give-five-examples-of-physical-changes-explain-why-each-example-is-a-physical-change-2

Name: give five examples of physical changes explain why each example is a physical change 2
Uploaded: 2020-10-13
Duration: 5 min 56 s
Channel: Numerade
Description: Give five examples of physical changes. Explain why each example is a physical change.

Question

Give five examples of physical changes. Explain why each example is a physical change.

Vishal Sharma · Accepted Answer

So in this problem, give five examples off physical changes and explain why each example is a physical change. So physical change examples. Okay, so first is melting off ice. So melting off ice is a physical direction in which water that is water in the form off solid. Or we can say ice. It converts into edge toward liquid. So this is an example off melting off isis. A physical change. Next example is evaporation off water evaporation off water in which water liquid converts in tow water. Guess next direction. Is this sublimation off? Gordon sublimation off I Odeen. So sublimation is the sublimation sublimation off. Hiring sublimation means when a solid is directly converts into yes, so I Odin in solid, which converts into i Odin in gas. So it is also an example of physical change. So next example is dissolving sugar in water on dissolving sugar in water. So this is also an example off physical change. For example, this C 12 h 20 to 11. So this is the formula sugar. When it is dissolved in water, it converts into C 12 h 20 to 11 a request form. So next example is phrasing off water, so phrasing off water. So in this reaction, water edge to a liquid convert Scinto h toe solid that when ice. So in all these reaction as the reactant and product side contained exactly the same compound. So we can say in all these reactions they they attend and the product side contain. They re a tent and product side contain exactly the same compound exactly this same compound, so we can conclude that so weekend conclude that no new chemical substance are formed. There is no new chemical substance are formed, are formed in these reactions and these reactions. So the reaction involved face change on Lee, so the reactions involves face change on Lee. Hence, they can be classified as physical change. Hence the can be classified as physical change, physical change. So in the physical change, material change. So in physical change in physical change, the material change the material, change its appearance, material change, it&#x27;s appearance or material change. It&#x27;s appearance or break apart or break apart. But it does not. It does not change identity, so this is known as the physical change. Some more example. We can say that the breaking off glass. It is also a physical change than boiling water melting off ice. Also a physical change. So these are some examples off the physical change in which no new substance is formed in the physical change.

Shreya Chanda · Answer

Hi, everyone. My name is Shreya Chanda and today we&#x27;re gonna be talking about physical changes. This problem comes from chemistry. 2005 Chapter one. The Signs of Chemistry Problem six. The problem asks you to give three examples of physical changes, but first we need to know what a physical change actually is. A physical change is a usually reversible change in the physical properties of a substance such a size, shape or phase. The first example of a physical change that we will discuss today is boiling water, boiling water or converting liquid water into ve Paris water is a physical change because it doesn&#x27;t alter the water itself. Water or H 20 remains chemically unaltered throughout the whole process and the process is reversible. Second, shredding a sheet of paper or cutting a sheet of paper. This is a physical change because the paper itself doesn&#x27;t change in the process, only its size and shape. Although this process is not reversible, it still counts as a physical change because the properties of the paper remain unchanged and finally mixing salt and sand is the third example of a physical change. This is a physical change because salt and sand remain chemically unaltered throughout the process. And this process is usually reversible. Thanks for joining me on this discussion of physical changes. Have a nice day.

Ali Mcdillon · Answer

Okay, So in a physical change, you&#x27;re substance, Um, is not changed at the particle level or at the molecular level, it&#x27;s still the same stuff. So if we had something like water, we could go from ice toe liquid water to steam. But we still have water, so phase changes would be one example. Um, if you are a visual person like me, you might want to see, So I&#x27;m gonna draw a little particle diagram for you. So water H 20 right has one oxygen and two 100 jin&#x27;s. So in ice, they&#x27;re gonna line up in such a way that the pattern repeats as we, um, draw it. Sorry for my rough sketch there, but it&#x27;s an easy repeating pattern in liquid water. They flow around each other, so not quite as nice of a repeating pattern kind of all over the place. However, they are still tightly packed, but you can see that there is, um, a difference. They&#x27;re not. All of the hydrogen aren&#x27;t in alignment. Um, they don&#x27;t have kind of that nice structure. So we&#x27;ve changed the arrangement of the particles, but they&#x27;re not different particles. Still water and same with steam. in gases. They&#x27;re going to spread out as much as possible, and they might even leave the container if it&#x27;s open. So that would be one example of a physical change. Another example would be something like ripping paper. It&#x27;s still paper, any anything where you were cutting or chopping something. It&#x27;s still that thing at the particle level.

Joshua Speer · Answer

so a physical change change is something about a substance. If we imagine, like a block of ice or something like that, Ah, physical change would be, ah, cooling it down or coming in and half something like that. If you think of a sheet of paper, a physical change might be tearing up into shreds. But the important thing is that you still have the same chemical identity before and after, you know it&#x27;s still paper even know. Smaller chemical change is just change that chemical identity. So if you said the paper on fire, it burns up into Ash and Co. Two and water. And these are all different chemicals if you melt the ice and it turns into water, while there&#x27;s a different in a different state than nice.

Theodore Donnell · Answer

today will be looking at problems 17 in Chapter one, talking about the difference between chemical and physical changes. So let&#x27;s start by defining these two terms. Chemical changes can be thought of as anything where we change the molecular structure. So a new structure by either making or breaking chemical bonds. So we have a new structure and new bonds, and those could be new bonds that were not there before or bonds that we have broken and that no longer exists. So a new bond pattern. In contrast, physical changes are described by having the same structure the same chemical molecule before and after the change. So same structure. And this implies that we have the same bonds as well, same structure and same bonds in a physical change, and with that thing about some examples of chemical and physical changes that we might see in everyday life. So the first example we&#x27;re gonna talk about is the electrolysis of water. Now, if you&#x27;re not familiar, electrolysis of water is just taking liquid water and applying electricity to it, which will abbreviate is E and causing it to split into hydrogen gas H two and oxygen gas. 02 If we look back to our definitions, we can see that we start with H 20 water, which has hydrogen oxygen bonds. And after we do the electrolysis, we have hydrogen, which has an H H bond, an oxygen which has an OOO bond. So we&#x27;ve changed the structure from water to the two new gases, and we&#x27;ve changed the bonds as well. Thus we can define electrolysis of water as a chemical change. In contrast, we can also think about ways that we could perform physical changes on water. So let&#x27;s say that we want to make some pasta. We need to boil some water, so I&#x27;ll just draw her pot here. We&#x27;ll fill it with some water h 20 for liquid water, and we&#x27;ll heat it up a little bit. And if we heat it long enough, then we can boil the water, get ready to throw in our pasta, and now we have maybe a little bit less water than we started with, cause we have evaporated some of the water. We still have some liquid water. It&#x27;s too Oh, but now we also have some water that&#x27;s evaporated gaseous water, and I&#x27;ll draw that up here above the pot. Now, if we compare before, we just had a TSH to O as a liquid and after we have some H 20 is a gas. But if we look at the molecular structure, we still have a TSH to Oh, no matter how you look at it, hydrogen bonds, hydrogen bonded to oxygen. So we have the same structure and the same bonds. There&#x27;s no bonds that have been made or broken, so this is a physical change. Boiling water is a physical change. The same is true if we were to frozen the water as well. And indeed, anything that boils or freezes is a physical change. Because the chemical structure isn&#x27;t changing, you&#x27;re just making the liquid into a solid or vice versa. Now let&#x27;s go to a new tab and think of a couple of other examples. Let&#x27;s say that we have a nice bicycle that we leave out in the front yard for a little too long. We&#x27;ll call that say, iron F E. And when we leave it outside for too long, that bike in the presence of air oh, to oxygen, we&#x27;ll start to rust and will form what&#x27;s called iron oxide, which we write is F you, too, 03 or more commonly known as rust. Now, if we go back to the rules that we defined, we need to look for either a new structure and new bonds or the same thing on both sides. We started with F E iron, so it&#x27;s just right down iron and oxygen, which has ooo bonds in the product. We have this compound that has iron and oxygen bonded together, so we&#x27;ve made new bonds, and we have a new structure as a result, so rust is actually a chemical process and a very important one. If you&#x27;ve ever had to say your car or your bike rust, it can be pretty annoying. But nonetheless, it is a chemical process, and we can compare that with something. Say, if we&#x27;re making jewelry and we have a bar of gold, I will abbreviate the gold with the chemical symbol a u gold. Now, if we want to pound this into a foil like you can see on some capital buildings, we&#x27;ll draw a little hammer and get to work, and we make a nice thin gold foil. So to think about whether or not this is a chemical change. We need to go back and think about the structure, the molecular structure. We start with gold. We&#x27;ve got gold bonded to gold in this block of gold. And when we pounded out to this foil, we still have a foil. But that foil is still made of gold, just gold. We haven&#x27;t added any new elements. We haven&#x27;t made any new bones and we haven&#x27;t changed the structure. Overall, we&#x27;ve just changed the shape of this larger material, not the molecular structure. So pounding out gold. And indeed changing the shape of anything is a physical change, not a chemical one. So pounding out gold is a physical change and the same is true if you cut something melted down like we did with the water boiling. Those are all physical changes because they do not change the molecular nature of the Adams. Sir, Gold stays gold when you pound it, whereas iron combining with oxygen changes the compound. And it&#x27;s a chemical change. So hopefully this helps you answer some questions about chemical and physical changes. Thank you

Catherine Lemar · Answer

three Examples of chemical changes include fire burning, something like a log or a piece of paper. Ah, the stomach acid. Digesting your food for cooking, something like a piece of toast for an egg.

Problem

Copy the equations $1-7$ onto your paper. Match t…

Problem 3 Easy Difficulty

Give five examples of physical changes. Explain why each example is a physical change.

Answer

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