Insufficient air supply to the flame. Insufficient time to burn. Cooling of the flame temperature before combustion is complete. However, it should be noted that, practically speaking, according to the ChemWiki page Burning Alkanes , the size of the hydrocarbon has an affect in 'normal' conditions: Provided the combustion is complete, all the hydrocarbons will burn with a blue flame.
The reason being according to ChemWiki is: If the liquid is not very volatile, only those molecules on the surface can react with the oxygen. Improve this answer. Take the tour to get familiar with this site. For more information in general have a look at the help center. Could you add an example for your explanation, I have a hard time understanding it. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown.
Featured on Meta. Now live: A fully responsive profile. Linked 5. Visually inspect heat exchanger for integrity. Check manifold gas pressures using a manometer and adjust if necessary. Check gas flow rate to appliance on metered appliances. Measure CO in flue products using an electronic CO analyzer with digital display.
Additional steps which help determine the cause of a heating appliance carbon monoxide problem include:. Verify proper combustion using a combustion analyzer with capability to measure carbon monoxide and oxygen content.
Determine leakage areas and pressure differences in the structure and vent system using a blower door and micromanometer. Check for proper gas orifice size. Continuously monitor carbon monoxide concentrations in the structure. Visual inspection of the burner will reveal obvious problems including rust, scale, or soot. Obvious flame pattern disruptions or improper color indicates a problem with combustion.
Unfortunately, visual inspection is NOT sufficient to verify proper combustion. Conversely, burners producing little carbon monoxide can burn yellow. Carbon monoxide is a colorless, odorless, tasteless, non-irritating and highly poisonous gas at low concentrations. Because it is not possible to reliably determine if a burner is producing excessive carbon monoxide visually, the use of an electronic carbon monoxide analyzer with digital display is recommended.
Use of an instrument to measure carbon monoxide concentrations outdoors, inside the structure, and in the flue products is critical to insure the heating appliance is operating safely. One cause— insufficient primary air opening. Flame Color: Yellow Can be either high or low CO, depends on adequate secondary air for complete combustion, no reliable visual method of determining CO production.
Burner and combustion chamber design affects the amount of carbon monoxide produced. Methods of reducing carbon monoxide production include providing excess air, increasing burner chamber temperature, and providing a large combustion zone. Unburned combustion products will continue to be oxidized in a hot combustion chamber with excess air. Unfortunately, excess air, high temperatures, and large combustion zones reduce efficiency and increase costs.
Simple actions, such as placing a cold pan on a kitchen stove top burner or blowing air from a fan across an unvented burner can increase carbon monoxide production. Oxidation of the combustion gases stops when the hot gases impinge on the cold pan or are cooled by the air from the fan. Any carbon monoxide not yet oxidized will be released into the room. Adjustment of the burner affects the amount of CO produced. Related questions How do you determine how much of the excess reactant is left over?
Also, how do you determine What is the limiting reactant in a Grignard reaction? Question 19e8d. Question c5be6. Question 19e Question dc Question bd.
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