Kinetic Molecular Theory Of Liquids And Solids Pdf

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This paper reports on the understanding of three key conceptual categories relating to the kinetic particle theory: 1 intermolecular spacing in solids, liquids and gases, 2 changes of state and intermolecular forces and 3 diffusion in liquids and gases, amongst high school students from Brunei, Australia, Hong Kong and Singapore using 11 multiple-choice items that required students to provide explanations for their selection of particular responses to the items. Also, However, when their explanations were taken into account, very few students displayed consistent understanding of the related concepts. This is a preview of subscription content, access via your institution.

11.1: A Molecular Comparison of Gases, Liquids, and Solids

You can do it! Let us help you to study smarter to achieve your goals. Siyavula Practice guides you at your own pace when you do questions online. The kinetic theory of matter helps us to explain why matter exists in different phases i. The kinetic theory of matter also helps us to understand other properties of matter. It is important to realise that what we will go on to describe is only a theory. It cannot be proved beyond doubt, but the fact that it helps us to explain our observations of changes in phase, and other properties of matter, suggests that it probably is more than just a theory.

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The kinetic molecular theory of matter explains how matter can change among the phases of solid, liquid, and gas. The kinetic molecular theory of matter offers a description of the microscopic properties of atoms or molecules and their interactions, leading to observable macroscopic properties such as pressure, volume, temperature. An application of the theory is that it helps to explain why matter exists in different phases solid, liquid, and gas and how matter can change from one phase to the next. The three phases of matter : Notice that the spacing between atoms or molecules increases as we move from a description of the solid phase to the gaseous one. Interactive: Intermolecular Attractions and States of Matter : Explore how states of matter are related to the strength of intermolecular attractions. We find that in its solid phase ice , the water molecules have very little energy and cannot move away from each other.

All three states of matter solid, liquid and gas expand when heated. The atoms themselves do not expand, but the volume they take up does. When a solid is heated, its atoms vibrate faster about their fixed points. The relative increase in the size of solids when heated is therefore small. Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers.

High marks in science are the key to your success and future plans. Test yourself and learn more on Siyavula Practice. The kinetic theory of matter helps us to explain why matter exists in different phases i. The kinetic theory of matter also helps us to understand other properties of matter. It is important to realise that what we will go on to describe is only a theory. It cannot be proved beyond doubt, but the fact that it helps us to explain our observations of changes in phase, and other properties of matter, suggests that it probably is more than just a theory.

11.2: Solids, Liquids, and Gases- A Molecular Comparison

The physical properties of a substance depends upon its physical state. Water vapor, liquid water and ice all have the same chemical properties, but their physical properties are considerably different. In general covalent bonds determine: molecular shape, bond energies, chemical properties, while intermolecular forces non-covalent bonds influence the physical properties of liquids and solids. The kinetic molecular theory of gases gives a reasonably accurate description of the behavior of gases. A similar model can be applied to liquids, but it must take into account the nonzero volumes of particles and the presence of strong intermolecular attractive forces.

Siyavula Practice gives you access to unlimited questions with answers that help you learn. Practise anywhere, anytime, and on any device! The kinetic theory of matter helps us to explain why matter exists in different phases i. The kinetic theory of matter also helps us to understand other properties of matter.

Matter is defined as anything that has mass and takes up space. To begin, present students with several different examples of matter, some solids, liquids, and gases. To reinforce definition of matter ask students to write down some observations of each example that they think makes it qualify as matter. Kinetic Molecular Theory Activity.

A KINETIC THEORY OF LIQUIDS

The Kinetic Molecular Theory allows us to explain the existence of the three phases of matter: solid, liquid, and gas. In addition, it helps explain the physical characteristics of each phase and how phases change from one to another. The Kinetic Molecular Theory is essential for the explanations of gas pressure, compressibility, diffusion, and mixing. Our explanations for reaction rates and equilibrium also rest on the concepts of the Kinetic Molecular Theory. This gas is essential for life.

While this little bit of tungsten residue is annoying for modern people who like to read at night, in the early s light bulbs used to burn out their filaments and turn black very quickly. Then in , the American chemist Irving Langmuir figured out a surprising solution to keep bulbs burning bright: fill the bulb with an inert , non-toxic gas called argon. Before Langmuir, manufacturers made light bulbs with a vacuum inside to prevent oxygen from contacting the filament. Langmuir figured out that by filling the bulb with argon gas , the tungsten atoms would take much longer to blacken the bulb. Instead of streaking straight towards the glass walls, they would collide and bounce off the argon atoms, sometimes even ricocheting back into the filament.


and his descriptions of the kinetic molecular pictures of gases, liquids and solids presented below. -- John H. Bedenbaugh. The Kinetic Molecular Theory.


The kinetic theory of matter helps us to explain why matter exists in different phases i. The kinetic theory of matter also helps us to understand other properties of matter. It is important to realise that what we will go on to describe is only a theory. It cannot be proved beyond doubt, but the fact that it helps us to explain our observations of changes in phase, and other properties of matter, suggests that it probably is more than just a theory.

Water vapor, liquid water and ice all have the same chemical properties, but their physical properties are considerably different. Due to the strong intermolecular forces between neighboring molecules, solids are rigid. The state of a substance depends on the balance between the kinetic energy of the individual particles molecules or atoms and the intermolecular forces.

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1 Response
  1. Matilda T.

    What affects surface tension? High surface tension is related to strong intermolecular forces. Water: 73 dynes/cm. Octane(C.

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