Wood burns with flame but coal does not. Why?
Coal does not have a flame because it requires oxygen to burn, and coal has a high carbon content which makes it difficult to burn without a sufficient amount of oxygen. This is why coal is typically burned in a controlled environment, such as a furnace, where oxygen can be supplied in the right amount.
Coal produces heat through a process called combustion, which is a chemical reaction between the carbon in coal and oxygen in the air. This reaction releases energy in the form of heat and light, without the need for a visible flame.
Yes, coal can produce a flame under certain conditions. If coal is heated to a high enough temperature, it can undergo a process called pyrolysis, which breaks down the organic compounds in coal and produces a visible flame. However, this is not a common occurrence and only happens in specific environments.
Yes, the type of coal can affect its ability to produce a flame. Generally, anthracite coal has a higher carbon content and burns at a higher temperature, making it more difficult to produce a visible flame. On the other hand, bituminous coal has a lower carbon content and burns at a lower temperature, making it easier to produce a visible flame.
Yes, there are several other factors that can affect coal's ability to produce a flame. These include the amount of oxygen present, the temperature at which the coal is burned, and the presence of other substances such as moisture or impurities. All of these factors can alter the combustion process and influence the appearance of a flame.