Why does gas have definite volume

Mass is the amount of matter an object has, and volume is the amount of space the matter takes up. Solids are easy to recognize.

They have definite shape, mass, and volume. This specific number of gas particles, at standard temperature and pressure ideal gas law occupies A measuring cup can be used to measure volumes of liquids. This cup measures volume in units of cups, fluid ounces, and millilitres. Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance solid, liquid, gas, or plasma or 3D shape occupies or contains. A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape.

Volume is the amount of space occupied by a substance, while mass is the amount of matter it contains. It has both mass and volume. Mass measures the amount of matter in a substance or an object. Volume measures the amount of space that a substance or an object takes up.

Volume is the measure of the 3-dimensional space occupied by matter, or enclosed by a surface, measured in cubic units. The SI unit of volume is the cubic meter m3 , which is a derived unit. Liter L is a special name for the cubic decimeter dm3. Begin typing your search term above and press enter to search. Q3 Give reasons for the following. Gases have no definite shape or volume.

Liquids have one free upper surface only. Globules of mercury kept in a petri dish, which is shaklen slowly, come together forming a big globule. A crystal of iodine on slow heating in a closed flask, turns into vapours and fills the complete flask.

An empty tumbler lowered into a glass beaker containing water, on tilting shows bubbles of air coming out, but when not tilted, no bubbles are seen. Looking to do well in your science exam? Learn from an expert tutor. Book a free class! Solution : Gases do not have a definite shape or volume because the molecules in gases are very loosely packed, they have large intermolecular spaces and hence they move around.

The force of attraction between molecules is also very less, as a result gases acquire any shape or any volume. Liquids have one free surface because they do not have a definite volume but a shape bounded by the container they are in, so the top surface of the container is the only free surface it has.

The formation of big globules is because of the forces of attraction existing between the molecules. The particles of solid are closely packed and occupy less space while particles of gases are loosely packed and occupy the complete space available. When the empty tumbler is tilted, the air inside the tumbler comes out and bubbles of air are seen. In particle physics, a massless particle is an elementary particle whose invariant mass is zero.

The two known massless particles are both gauge bosons: the photon carrier of electromagnetism and the gluon carrier of the strong force. Neutrinos were originally thought to be massless. It has both mass and volume. Mass measures the amount of matter in a substance or an object. Volume measures the amount of space that a substance or an object takes up.

The Higgs field gives mass to fundamental particles—the electrons, quarks and other building blocks that cannot be broken into smaller parts. The energy of this interaction between quarks and gluons is what gives protons and neutrons their mass.

Matter can be converted into energy, and vice versa. The rest mass of the electron is 9. An electron is therefore considered nearly massless in comparison with a proton or a neutron, and the electron mass is not included in calculating the mass number of an atom. Light is composed of photons, so we could ask if the photon has mass. According to theory it has energy and momentum but no mass, and this is confirmed by experiment to within strict limits.

By itself, electron is good, not negative. The energy of the electron is deposited at a point, just as if it was a particle. So while the electron propagates through space like a wave, it interacts at a point like a particle. This is known as wave-particle duality. This proves that electrons act like waves, at least while they are propagating traveling through the slits and to the screen.

Einstein believed light is a particle photon and the flow of photons is a wave. Electrons are found in certain orbits because they interfere with themselves and create standing waves. Because an electron is a quantum object with wave-like properties, it must always be vibrating at some frequency. Furthermore, an electron in a stable atomic state does not move in the sense of waving through space. The orbital electron does move in the sense of vibrating in time.

Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed. Quantum view of light: The photoelectric effect introduced evidence that light exhibited particle properties on the quantum scale of atoms. Begin typing your search term above and press enter to search. Press ESC to cancel.

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