Question
Q12. The diagrams show two Bunsen burners. One burner has the air hole closed, and the other has the air hole open. (a) Explain why opening the air hole of a Bunsen burner makes the flame hotter. There is more oxygen...added to the flcune. (b) Natural gas is methane, mathrm(CH) 4 . It is burned in a Bunsen burner. Complete the word equation for the chemical reaction in the clear blue flame methane + oxygen...... arrow
Answer
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Grant
Professional · Tutor for 6 years
Answer
(a) Opening the air hole provides more oxygen, increasing the combustion process, making the flame hotter.(b) Festively labelled in word equation form, Methane (Natural Gas) + Oxygen ---> Carbon Dioxide + Water.
Explanation
(a) When we open the air hole of a Bunsen burner, it allows more oxygen to enter the system. When more oxygen gets in contact with fuel, namely natural gas here, it encourages a more complete and efficient combustion. Since oxygen aids the burning or combustion process, and as the combustion efficiency increases with the added amount of oxygen, this results in raising the temperature levels and inevitably, the flame turns hotter.(b) If you've studied chemistry, you should be familiar that natural gas (methane, CH4 in this context), when burned/combusted in the presence of oxygen, gives off heat energy, forming water and carbon dioxide as byproducts. Therefore, the chemical reaction would be put as:Methane (Natural Gas) + Oxygen ---> Carbon Dioxide + Water.So, we've finished completing the given context by elaborating on the chemical reaction of natural gas when burnt in a Bunsen burner.This would be written in word equation form as mentioned.To recount, we answered:(a) Opening the air hole makes the Bunsen burner flame hotter because it allows more oxygen to enter, highlighting the improved rate and temperature increment of efficiency of gas combustion.(b) Furthermore, we accomplished the little task related to completing the explaining on the chemical reaction in Bunsen burner.