Chemistry Vocab: Sublimation-Energy Transfer
Endothermic
A chemical reaction that absorbs (takes in) heat energy causing a drop in temperature
Exothermic
A chemical reaction that gives off heat energy causing an increase in temperature.
Density
Density = Mass/Volume
Thermal Energy
The energy (heat) contained in the motion and vibration of its molecules. It is measured through temperature.
Mass
The measure of the amount of matter in an object. Units are usually grams or kilograms.
Volume
The measure of the amount of space that a substance or an object takes up.
Deposition
The process by which a gas changes phase and turns directly into a solid without passing through the liquid phase.
Condensation
The process by which water vapor (gas) in the air is changed into a liquid
Sublimation
The process of a substance changing directly from a solid to a gas.
Conduction
The process of transferring energy from a higher temperature to a lower temperature by direct contact.
Evaporation
The process of turning a liquid into a vapor or gas.
Chemical Reactions
The process when substances are changed into new substances.
Products
The substance formed during a chemical reaction. Reactant → Product
Reactants
The substance present before a chemical reaction. Reactant → Product
Freezing Point
The temperature at which a liquid changes to a solid.
Energy Transfer
The transfer of energy from one object or material to another.
Chemical Properties
These are observed during a chemical reaction. Ex) flammability (how a substance will ignite), radioactivity, and toxicity (how a substance will damage something living).
Physical Properties
These can be measured without changing the composition of the matter. They are used to observe and describe matter. Ex) Texture, color, melting and boiling point
