combustion
egg rolls
Candle burning is the process called oxidation. This is, it's the reaction that takes place when a gaseous material reacts with oxygen, the wax needs to change to gaseous state for the reaction to take place.
Something that burns or is flammable would be a chemical change.
When a candle burns, the chemical potential energy stored in the wax is converted into heat and light energy through the process of combustion. The chemical bonds in the wax molecules break down, releasing energy in the form of heat and light.
Chemical energy converts into radiation plus heat. (Some of which also converts itself into [IR] radiation)
A candle has thermal energy because of it flames, the flames have heat and thermal energy is heat.
Yes, burning a candle is a chemical change. New chemical compounds are being formed as the reaction continues. The paraffin in the candle is a hydrocarbon chain, and it is "breaking down" chemically using oxygen from the air to form (idealy) carbon dioxide and water. But there are also physical changes that take place at the same time. Phenomena during the candle burning: - melting (physical phenomenon) - evaporation (may be considered a chemical but also a physical phenomenon) - oxydation - reaction with oxygen, burning (chemical phenomenon) - thermal decomposition (chemical phenomenon)
The was becomes liquid and drips down the rest of the candle.
When fire burns logs, a chemical change is taking place. The heat from the fire causes the wood to undergo combustion, which is a chemical reaction that breaks down the wood's molecular structure and releases energy in the form of heat and light.
When a log burns in a fire, the chemical reactions that take place involve the wood combining with oxygen in the air to produce heat and light. This process is known as combustion, where the wood undergoes a chemical reaction that releases energy in the form of heat and light.
The combustion of butane to produce a flame is a chemical reaction known as a combustion reaction. In this reaction, butane reacts with oxygen to produce carbon dioxide, water, and heat energy.
No; the process only takes place the other way around. The chemical energy in the wax is converted in an exothermic reaction (combustion) to "free" energy, which goes into the air around (heat).