(i) A coal or charcoal burns with just a glow red and gives out heat without flame however LPG burns with flame, this is because a flame is produced only when gaseous substances burn.
What does coal burn with?
Coal fires are created by the interaction of carbon, oxygen and heat, which in turn produces carbon monoxide, carbon dioxide, and more heat to fuel the reaction. Meanwhile, hydrogen in the coal is converted to water vapour, nitrogen to nitrogen dioxide and sulphur to sulphur dioxide.
What happens when charcoal is burnt?
Charcoal reacts with oxygen of the air at a glowing red heat to form colourless carbon monoxide gas, which then burns with a blue flame with more oxygen from the air to produce carbon dioxide gas. … Unburned carbon monoxide gas can be given off by burning charcoal.
When charcoal burns which flame is produced?
Coal just glow red on combustion. 1)When the oxygen supply or air supply is insufficient,then the fuels burn incompletely producing mainly a yellow flame. The yellow flame is caused by the glow of hot unburnt carbon particles produced due to incomplete combustion of fuel.
What is the reaction of burning of coal?
At the operating temperature of about 980 °C (1,800 °F), the oxygen reacts with coal to form carbon dioxide, thereby producing heat to sustain the endothermic steam-carbon and carbon dioxide-carbon reactions.
What are the 4 types of coal?
Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite.
Why is coal power bad?
Air pollution from coal-fired power plants is linked with asthma, cancer, heart and lung ailments, neurological problems, acid rain, global warming, and other severe environmental and public health impacts.
What burns hotter charcoal or wood?
Charcoal has an energy value of around 29 MJ/kg, in other words charcoal burns hotter than wood, but when not insulated or not receiving sufficient air supply (including secondary air), the absence of flames or fast flowing CO2 gases will result in less efficient cooking due to a lower heat transfer efficiency (HTE).
Is it safe to burn charcoal indoors?
Burning charcoal produces carbon monoxide, a colorless, odorless gas. Charcoal should never be used indoors, even if ventilation is provided. … Do not store a grill with freshly used coals indoors until the charcoal is completely extinguished.5 мая 2002 г.
Is burning charcoal indoors dangerous?
There is no ban on the use of charcoal for cooking indoors but it must be carefully controlled. When charcoal burns it produces significant amounts of carbon monoxide and, if used indoors, the gas can build up and lead to carbon-monoxide poisoning.
What is difference between burning of candle and burning of coal?
Burning of coal is chemical change while burning of candle is physical as well as chemical change. coal is naturally available and is carbon based. … Coal is primarily used as a solid fuel to produce electricity and heat through combustion candle is made of wax.
Why do coals glow red?
(i) A coal or charcoal burns with just a glow red and gives out heat without flame however LPG burns with flame, this is because a flame is produced only when gaseous substances burn. When wood or charcoal is ignited, the volatile substance present in it vapourizes and burns with a flame in the beginning.
What actually burns to produce a flame?
In factories, we use coal or fuel oil or natural gas. … For example, a candle or coal gas on burning produces a flame, but not the coal or charcoal. So, let us study the chemical process of burning and the types of flame produced during this process.
How long can coal burn?
Results may vary, but the average burn time between loads ranges from 8-24 hours. These burn times may exceed the averages, depending on the situation as every situation is different. How many BTU’s are in Anthracite Coal? There are around 13,500 BTU per pound of Anthracite Coal.
What is the chemical equation of burning of coal?
Following chemical reactions takes place in the combustion of coal with the release of heat: C + O2 = CO2 + 8084 Kcal/ Kg of carbon (33940 KJ/Kg) S + O2 = SO2 + 2224 Kcal/Kg of sulfur (9141 KJ/Kg) 2 H2 + O2 = 2 H2O + 28922 Kcal/Kg of hydrogen (142670 KJ/Kg)
Which gas is released by burning coal?
Carbon dioxide (CO2)