How hot is fire? Is it just orange, red, and yellow? What do the different colors even mean? Let’s find out! Show
IntroductionWhen we look into humanity’s history, fire was one of the first things to enable humankind to prosper. We use fire daily for multiple reasons, like cooking, manufacturing, or keeping us warm. Depending on the fuel that allows the fire to burn and its intensity, it can turn to different colors. These colors can be:
So, how hot is fire? It depends on the color and energy source. You may want to learn about the fire triangle to understand better the relationship between oxygen, fuel, and heat that creates a flame. What is the temperature of a fire by color?How hot is blue fire?The blue fire is hot enough to melt iron ores and extract iron. When humans could create blue fire, the Iron Age began. In general, natural gas stoves create a blue flame used for cooking. Propane flames are also blue but have yellow tips. In general, a blue flame combines gas and oxygen and shows when there’s efficient combustion (as in no waste). A blue fire averages between 2,550 and 3,000 Fahrenheit (1,400 – 1,650 Celsius). How hot is red fire?Red fire is one of the most common colors and has one of the lowest temperature burnings of its peers. A red fire can get to 1,470 Fahrenheit (ca. 799 °C). How hot is black fire?Black fire happens when fire combines with salt water. It’s a fragile flame that barely has light, therefore the color. How hot is orange fire?Orange fire produces when burning everyday items. It’s one of the most common colors since it’s the color at which carbon burns. And most organic material on Earth is carbon-based. For example, wood, vegetation, oil, charcoal, etc. When humans successfully created orange fire consistently, the Bronze Age began. That’s because orange fire is strong enough to melt gold and copper. An orange fire can get to 2,000 Fahrenheit (ca. 1,093 °C). How hot is white fire?White fire burns high and can melt uranium, nickel, or cobalt. A common phrase is when some say something is “white-hot.” It refers to being superheated or scorching. A white fire can get to 2,730 Fahrenheit (ca. 1,499 °C). How hot is yellow fire?Yellow fire produces when burning sugar cane, wood pulp, or sugar. It’s a second-most-common color in nature. A yellow fire can get to 2,200 Fahrenheit (ca. 1,204 °C). How hot is violet fire?Violet fire is the strongest and hottest of all the colors. It can melt almost anything. Therefore, factories, welders, and cutting operations are among the few who use them. A violet fire can reach above 3,000 Fahrenheit (ca. 1,649 °C). How hot is green fire?Green fire is a liar! You can never know at what temperature it is burning. The reason is that the green color is not due to temperature but to the fuel used for burning. One of the most common materials that produce this color is copper. How hot is indigo fire?Indigo fire burns on the full range of what a blue fire burns. A big difference is that indigo is far simpler to manage than blue, so ironworking and glass production typically prefer this flame color. An indigo fire can get to 3,000 Fahrenheit (ca. 1,649 °C). Why is fire hot?Fire is hot because it releases more energy from heat needed to sustain itself during combustion. If you carefully approach an open flame, you can perceive the energy or heat it irradiates. Just remember, every fire is hot and, therefore, potentially dangerous! Regardless of the fuel type that it uses. Is Fire the Hottest Thing in the World?It’s an interesting question. There is a lot of debate over which object is the hottest – fire, liquid nitrogen, the Sun, or the stars. Even at its hottest possible temperature, around 6,100 Fahrenheit (ca. 3,371 °C), fire is not the hottest thing on Earth. The hottest recorded temperature on Earth was an experiment conducted at the Large Hadron Collider at CERN. Their experimentation produced a mind-boggling temperature of 9.9 trillion degrees Fahrenheit (5.5 trillion degrees Celsius). That’s about 366,000 times the temperature in our Sun’s core! Can fire have multiple colors at the same time?Absolutely! Take, for example, a typical fireplace. Depending on the firewood and the flames’ size, the region near the logs will burn almost white or yellowish. That is due to the extreme heat at the base. As we move higher, the flames turn orange and red. But that’s because the temperature reduces as we get away from the heat’s source. Examples of heat sources
Examples of materials’ melting point temperatures
The complete fire color cheat sheetNow that we’ve explored the different colors and their temperatures, the following resume can come in handy:
In conclusionThe color of fire can tell us a lot about its temperature. It can be an excellent way to understand it. However, sometimes, as it happens with green or black fires, that color can be misleading. Fire can have multiple colors depending on the proximity to the fire’s core and the current stage of the fire. I.e., it’s not the same if it’s growing or fully developed. Finally, the combustion efficiency and fuel type can influence the flame’s color. How hot is the coldest fire?The lowest recorded cool flame temperatures are between 200 and 300°C; the Wikipedia page references n-butyl acetate as 225°C.
How hot is a wood fire?Internal Temperature: A campfire can reach internal temperatures of 1650°F (900°C) in the flames, known as the continuous flame region. Cooking Temperature: Above the flames (called the thermal plume region) where no flames are visible, you can expect temperatures of about 600°F (320°C).
How hot is natural fire?But the average forest fire sends temperatures rocketing up past 800 degrees Celsius (1,472 degrees Fahrenheit), hot enough to cremate a human or melt a camera.
How hot is red fire?Scientists have learned that red flames correspond to temperatures from 980º F up to 1,800º F. Flames turn orange when the temperature reaches 2,000º F to 2,200º F.
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How hot is fire in degrees
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