An investigation to determine which of four alcohols is the most exothermic

Investigation to determine which of the four alcohols is the most exothermic prediction Because the size of the alcohol molecule can increase with heat, we estimate that the calorie per mole of combustion is the most propanol. Alcohol generates heat when burning in oxygen or air. The amount of heat generated per mole of alcohol will be proportional to the amount of air present. With complete combustion, only two products of carbon dioxide and water vapor are produced. It is assumed that there is a binding energy to combine atoms in one molecule.

What is burning? The definition of combustion obtained from Richard Harwood's chemistry textbook is "chemical reaction of matter reacting with oxygen - reaction is exothermic, combustion is a combustion reaction that generates flames." The reactions occurring in our survey are combustion reactions It will be. It burns alcohol by colorimetric analysis. The combustion of alcohol produces carbon dioxide and water. This is represented by the following expression. What?

All combustion reactions from alcohol are exothermic, exotherm is the process of releasing heat, and in exothermic reaction the decrease in enthalpy of the reaction is negative. In the endothermic reaction, the increase in the enthalpy of the reaction system is positive. The enthalpy of the exothermic process becomes negative. Examples of exothermic processes are combustion reactions and neutralization reactions. I will guide myself with my plan, follow my plan and change my plan to get accurate results. At the beginning of the survey, I was not sure about the weather experimenting with the lid or lid. But after the preliminary test with the lid on the lid and covered with butan-1-ol, I got the following results:

I made the following experiment to plan the investigation. Experiment on page 191 to identify substances causing endothermic or exothermic reactions. Previous alcohol experiment practice experiments allowed us to find corrections to specific procedures, various precautions, hints to reduce inaccuracies, important elements found, and how to configure the device. Below is the setting of my results table as an example I learned from simulated experiments.

The combustion reaction always contains oxygen, which is almost always exothermic. An exothermic reaction releases energy in the form of heat. The purpose of this experiment was to find empirical formulas of compounds using integers. To study this experiment, the empirical formula of the compound was obtained by measuring the masses of the metal and the gas. Collect the necessary materials before starting the experiment: Crucible and lid, Bunsen burner, deionized water or distilled water, striker, magnesium strip, sandpaper (if necessary), clay triangle, wire mat, pliers, electronic scale , Ring clamp, experiment stands, paper records data. Collect two each of the materials needed to perform two tests at once