How can you prove that oxygen is needed for burning?

Answer: take a candle and fix it on a table. the candle must be lighted. the candle willcontinuity to burn due to continuously available fresh air providing the required oxygen for combustion.

How the presence of oxygen helps in burning of fire?

Oxygen. Air contains about 21 percent oxygen, and most fires require at least 16 percent oxygen content to burn. Oxygen supports the chemical processes that occur during fire. When fuel burns, it reacts with oxygen from the surrounding air, releasing heat and generating combustion products (gases, smoke, embers, etc.).

Do you need oxygen for a fire to burn?

Three things are required in proper combination before ignition and combustion can take place—Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.

Why air is needed for burning proof this statement through activity?

When the burning candle is covered with gas jar, then the candle takes away the oxygen necessary for burning from the air enclosed in the gas jar. This proves that air is necessary for combustion of substances.

Who proved that matter needs oxygen to burn?

When Joseph Priestley discovered oxygen in 1774, he answered age-old questions of why and how things burn.

What does a fire need to burn?

Oxygen, heat, and fuel are frequently referred to as the “fire triangle.” Add in the fourth element, the chemical reaction, and you actually have a fire “tetrahedron.” The important thing to remember is: take any of these four things away, and you will not have a fire or the fire will be extinguished.

What causes fire to burn?

Fire is the result of applying enough heat to a fuel source, when you’ve got a whole lot of oxygen around. As the atoms in the fuel heat up, they begin to vibrate until they break free of the bonds holding them together and are released as volatile gases.

How will you prove that air supports burning explain with activity and draw a diagram?

Take a candle and try to burn it in air. Take another candle and try to burn it while keeping it submerged in water. You will observe that, while the candle burns in air; it does not burn in water. This simple activity shows that air support burning.

When was it discovered that fire requires oxygen in order to burn?

Phlogiston remained the dominant theory until the 1770s when Antoine-Laurent de Lavoisier showed that combustion requires a gas that has weight (specifically, oxygen) and could be measured by means of weighing closed vessels.

How is oxygen discovered?

An English chemist, Joseph Priestley, independently discovered oxygen in 1774 by the thermal decomposition of mercuric oxide and published his findings the same year, three years before Scheele published.