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What property is sublimation?
There are very few substances which vaporize without melting, but in all cases of sublimation, the change from the vapor to the solid state, is direct, and without any formation of liquid. The sublimed body is recovered unchanged chemically, but its physical properties are often more or less altered.
Is sublimation a physical or chemical property?
physical change
The term sublimation refers to a physical change of state and is not used to describe the transformation of a solid to a gas in a chemical reaction. For example, the dissociation on heating of solid ammonium chloride into hydrogen chloride and ammonia is not sublimation but a chemical reaction.
Is sublimation a chemical property?
Sublimation is a physical change. When a substance sublimes, it changes from a solid to a gas without going through the liquid phase.
What type of reaction is sublimation?
Sublimation is the transition of a substance directly from the solid phase to the gas phase without passing through the intermediate liquid phase (Table 4.8, Fig. 4.2). Sublimation is an endothermic phase transition that occurs at temperatures and pressures below the triple point of a chemical in the phase diagram.
What kind of property is magnetizing steel?
Other examples of physical changes include magnetizing and demagnetizing metals (as is done with common antitheft security tags) and grinding solids into powders (which can sometimes yield noticeable changes in color).
What property must a substance possess to undergo sublimation?
Sublimation takes place when the temperature and pressure are less than the triple point (the temperature and pressure at which a solid, liquid and gas coexist) of a given substance.
Is sublimation endothermic or exothermic?
Phases and Phase Transitions
| Phase Transition | Direction of ΔH |
|---|---|
| Vaporization (liquid to gas) | ΔH>0; enthalpy increases (endothermic process) |
| Sublimation (solid to gas) | ΔH>0; enthalpy increases (endothermic process) |
| Freezing (liquid to solid) | ΔH<0; enthalpy decreases (exothermic process) |
Is magnetizing steel a physical property?
What type of property is magnetizing steel?
Is sublimation exothermic or endothermic?
Is sublimation a combustion reaction?
Combustion reactions like burning wood do not count as sublimation as combustion is a chemical reaction caused by the oxidization of reactants. Sublimation requires the input of energy and is thus an endothermic reaction.
Is magnetism a physical or chemical property?
Attraction to a magnet is a physical property of iron. Every substance has physical properties that make it useful for certain tasks. Some metals, such as copper, are useful because they bend easily and can be pulled into wires.