Is Glass a solid or a liquid?

Answer 1

Depends on the temperature.

Answer 2

There is no clear answer to the question "Is glass solid or liquid?". In terms of molecular dynamics and thermodynamics it's possible to justify various different views that it is a highly viscous liquid, an amorphous solid, or simply that glass is another state of matter which is neither liquid nor solid!........... From a more common sense point of view, however, glass should be considered a solid, since it's rigid according to everyday experience. The use of the term "supercooled liquid" to describe glass still persists, but is considered by many to be an unfortunate misnomer that should be avoided

Answer 3

Unfortunately the strict tripart of Solid/Liquid/Gas is known to be redunant but is still used in Schools in the same way as the 'planetary' model of the atom is known to be incorrect but is taught anyway as it is easier. There are dozens of different 'states' in which matter can appear from aerogels to plasma, and all manner of halfway states.

On a short time scale a window is solid, on a longer it is a viscous liquid. In a similar sense any solid becomes a liquid then a gas on a long time scale due to decay and evaporation.

Answer 4

There is no clear answer to the question "Is glass solid or liquid?". In terms of molecular dynamics and thermodynamics it is possible to justify various different views that it is a highly viscous liquid, an amorphous solid, or simply that glass is another state of matter which is neither liquid nor solid. The difference is semantic. In terms of its material properties we can do little better. There is no clear definition of the distinction between solids and highly viscous liquids. All such phases or states of matter are idealisations of real material properties. Nevertheless, from a more common sense point of view, glass should be considered a solid since it is rigid according to everyday experience. The use of the term "supercooled liquid" to describe glass still persists, but is considered by many to be an unfortunate misnomer that should be avoided. In any case, claims that glass panes in old windows have deformed due to glass flow have never been substantiated. Examples of Roman glassware and calculations based on measurements of glass visco-properties indicate that these claims cannot be true. The observed features are more easily explained as a result of the imperfect methods used to make glass window panes before the float glass process was invented.

Answer 5

Solid

Answer 6

No love you are confused. A glass is a solid used to hold a liquid, preferably vodka!

Answer 7

Glass is generally treated as an amorphous solid rather than a liquid, though different views can be justified since characterizing glass as either 'solid' or 'liquid' is not an entirely straightforward matter. However, the notion that glass flows to an appreciable extent over extended periods of time is not supported by empirical research or theoretical analysis.

From a more commonsense point of view, glass should be considered a solid since it is rigid according to everyday experience.

Some people believe glass is a liquid due to its lack of a first-order phase transition where certain thermodynamic variables such as volume, entropy and enthalpy are continuous through the glass transition temperature. However, the glass transition temperature may be described as analogous to a second-order phase transition where the intensive thermodynamic variables such as the thermal expansivity and heat capacity are discontinuous. Despite this, thermodynamic phase transition theory does not entirely hold for glass and hence the glass transition cannot be classed as a genuine thermodynamic phase transition.

Although glass is amorphous like a supercooled liquid, it is generally classed as solid below its glass transition temperature. There is also the problem that a supercooled liquid is still a liquid — moves and behaves like a liquid, not a solid — but is below the freezing point of the material and will crystalize almost instantly if a crystal is added as a core.

The change is heat capacity at a glass transition and a melting transition of comparable materials is typically of the same order of magnitude. indicating that the change in active degrees of freedom is comparable as well. Both in a glass and in a crystal it is mostly only the vibrational degrees of freedom that remain active , whereas rotational and translational motion becomes impossible. This explains why glasses and crystalline materials are hard.

Answer 8

Its a solid

Answer 9

solid. people only think it's liquid because of the waviness of old windows. thats not because its 'flowed' it's cos they couldn't do the glass right

Answer 10

It's a very stiff liquid that behaves like a solid. A window pane slowly flows downwards and you can tell how long it has been in place by how much thicker it is at the bottom.

Answer 11

Its a liquid...as things have names when made from glass..