Why was there condensation of the beaker of cold water when a blue flame
was passes underneath? This experiment is from the Gas Burner experiment.
A) the product of carbon dioxide from combustion
(B) the product of hydrogen dioxide from combustion
(C) left over unburned oxygen
(D) left over unburned methane
(E) melting of the glass
Hint: the condensation is due to water. See if you can find the right answer in disguise.
To determine the reason for condensation in the beaker of cold water when a blue flame is passed underneath, we need to understand the process of combustion and the possible products formed.
When a hydrocarbon fuel, such as methane (CH4), burns in the presence of oxygen, it undergoes combustion to produce carbon dioxide (CO2) and water (H2O). The balanced equation for the combustion of methane is:
CH4 + 2O2 -> CO2 + 2H2O
In this experiment, a blue flame is created by burning fuel, presumably methane, in the gas burner. When the blue flame is passed underneath the beaker of cold water, several factors can contribute to condensation:
(A) The product of carbon dioxide from combustion:
One of the products of combustion is carbon dioxide (CO2). During the burning process, some of the CO2 produced from combustion can come into contact with the cold surface of the beaker and condense, similar to how water vapor condenses on a cold window.
(B) The product of hydrogen dioxide from combustion:
Hydrogen dioxide, also known as water (H2O), is another product of combustion. If the water vapor generated from the combustion process comes into contact with the cold surface of the beaker, it can condense and form droplets of water.
(C) Leftover unburned oxygen:
If there is insufficient methane or incomplete combustion, there might be leftover unburned oxygen (O2) present. When the flame passes underneath the cold beaker, any unburned oxygen might react with the cold surface and form water through a process called oxidation, leading to condensation.
(D) Leftover unburned methane:
In some cases, incomplete combustion can occur, resulting in leftover unburned methane (CH4) being released into the surroundings. This unburned methane might come into contact with the cold surface of the beaker and condense.
(E) Melting of the glass:
The condensation of water vapor does not cause glass to melt. The temperature at which glass typically melts is much higher than the temperature at which water vapor condenses.
To determine the correct answer, further information or clarification about the experiment is necessary.