GOB Chemistry

Learn the toughest concepts covered in your GOB - General, Organic, and Biological Chemistry class with step-by-step video tutorials and practice problems.

Matter and Measurements

Physical Properties

Physical Properties are measurable properties that describe the state of chemical compounds. 

Understanding Physical Properties



Physical Properties Concept

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So now we're gonna take a look at the physical properties. Now we're gonna say physical property itself is a measurable property that describes the state of a chemical compound here. It could be observed through your senses without changing the chemical structure of a substance. So it's something that we can observe by either seeing it, touching it, smelling it, using our own faculties. Now, some of the most common types of physical properties. If we take a look at these images in the first one, we have ah, color palette. So for my fellow artists were gonna say that color is a physical property. An object appears. Read a knob checked appears yellow. These colors that there that are shown to us represent physical properties. In the next image, we have a beaker filled with a liquid which we assume is water. Now one object sinks to the bottom of it, while another one floats on top of it. Now, what determines if an object is heavy enough to sink into the liquid or light enough to float on top? Is its density so density he is a physical property. Next, we have here an image of an anvil, which was related to the idea of mass So masses of physical property. Next, we have a cube. The space inside the cube represents its volume. Next year we have a pot which seems to be boiling or bubbling because the temperature has been raised on it. Here. We'd say that physical properties would be boiling point, but it wouldn't just stop a boiling point. We can also include here freezing point or melting point. Okay, now boiling point. We can abbreviate as BP freezing point FP and melting point MP. Finally, if we take a look at this last image, we have a diamond. So a diamond is known as one of the hardest natural materials in the universe. So it's one of the hardest materials you can find in nature. So when we talk about a diamond, we're just talking about the hardness of an object. And also besides hardness, we could talk about the opposite, the softness of the material. How easy is it for me to break that material versus how difficult it iss. So we're talking about a scale of hardness to softness when we talk about a material. Now, these here represent the most common types of physical properties you'll come across. And just remember, if you can observe an object with your senses, then that can represent a physical property. Now that we've gone over the basic idea of it, let's move on to the next video. And let's tackle some questions where we have to either identify what is or isn't if it's school property.


Physical Properties Example

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So if we take a look here in this example question, it says which the following represents a physical property. Now remember, a physical property deals with something we could observe with our senses, whereas a chemical property really talks about a compound and the chemical reaction it undergoes. Now, if we look at a, it's his potassium metal is extremely reactive when placed in water. So we're talking about the reactivity of potassium within water. Reactivity is a chemical property. Next, rusting is a common issue with aluminum. We talked about thrusting before. We say that rusting is how the surface of a metal interacts with oxygen in the air. It undergoes a chemical reaction, and since we're talking about rusting as a type of chemical reaction, this would represent a chemical property. Okay, Neon has an un reactive nature. Whether something is reactive or nonreactive or un reactive, we're talking about it's reactivity, so that is a chemical property. The butane in the lighter is highly flammable. Flammability is an example of a chemical property. The answer here has to the option E Here, it says, mercury is a silvery liquid at 25 degrees Celsius. We're talking about its appearance. Its color color is one of the first physical properties we discussed, so you would have to be my answer. So just remember, when we talk about a physical property, it's something we can observe through the use of our senses. Ah, chemical property has more in line to do with an object and how it undergoes a chemical reaction.

Which of the following is not a physical property?