What is the hottest part of the flame?

The hottest part of a flame is known as the inner cone or the blue zone. It is the region of the flame where complete combustion occurs, producing the highest temperatures.

The inner cone appears blue due to the presence of highly energized molecules. This part of the flame is where the fuel (such as gas or oil) and oxygen are in perfect balance, allowing for efficient combustion to take place. The blue color is a result of the complete combustion of hydrocarbon molecules, converting them into carbon dioxide and water vapor.

The temperature of the inner cone can reach up to approximately 1,400 to 1,900°C (2,550 to 3,450°F), depending on the type of fuel being burned. These high temperatures make the inner cone ideal for applications requiring intense heat, such as welding, metalworking, or glassblowing.

It is important to note that the outer part of the flame, known as the outer cone or the yellow zone, is relatively cooler compared to the inner cone. This is because the fuel and oxygen are not in perfect balance in the outer cone, leading to incomplete combustion and lower temperatures.

Understanding the different regions of a flame is crucial for various industries, scientific research, and practical applications that rely on the control and utilization of high-temperature heat sources.