Is the temperature of a luminous flame greater than that of a non luminous flame? Please explain.
The luminous flame is caused by the gas not burning completely. The "luminous" part is caused by the glowing embers of the carbon that wasn't burned to CO2. So you think the answer is ......?
The luminous flame temp is less than the non luminousnonluminous? correct?
You are so very correct. Good work.
Yes, the temperature of a luminous flame is generally greater than that of a non-luminous flame. To understand why, we need to know the factors that influence the temperature of a flame.
The temperature of a flame is primarily determined by the combustion process and the fuel involved. The key factors that affect flame temperature are the availability of oxygen, the type of fuel, and the completeness of the combustion process.
In a luminous flame, the combustion process is incomplete, resulting in the production of soot particles. These soot particles emit light, giving the flame its characteristic glow. The presence of these particles indicates that there is unburned fuel, which means that the flame is not utilizing all the fuel efficiently to release heat.
On the other hand, a non-luminous flame is a result of complete combustion. The fuel is burned efficiently, resulting in the absence of soot particles and the flame being much less visible. In this case, the fuel is utilized more effectively, and the combustion process is more complete.
Now, since the luminous flame is not burning the fuel as efficiently as the non-luminous flame, it releases more heat energy to its surroundings. Consequently, a significant portion of the heat energy is lost as light, reducing the flame's overall temperature. In contrast, a non-luminous flame burns more efficiently, converting a higher proportion of the fuel's heat energy into thermal energy, resulting in a higher flame temperature.
It's worth noting that the specific temperatures of flames vary depending on the type of fuel used and other factors, but in general, a non-luminous flame tends to have a higher temperature than a luminous flame due to more efficient combustion.