How Does The Molecular Mass Of Alcohols Affect The Rate Of Evaporation
Chemistry IA
How does the molecular mass of alcohols affect its rate of evaporation?
Introduction
Alcohols are some of the most important molecules in organic chemistry. They can be converted into many different types of compounds. Alcohols contain the hydroxyl functional group (-OH), bonded to a carbon atom of an alkyl or substituted alkyl group. The weight of the different compounds will differs because of the amount of hydrogen bonding. There are three kind of alcohols, primary, secondary and tertiary. The alcohols that will be used here will only be part of the primary and secondary group. The 5 alcohols will be Methanol, Ethanol. Propan-2-ol, Butan-1-ol and Pentan-1-ol .
In this experiment we are going to test how alcohol evaporates. …show more content…
How are you measuring?
Independent Molar mass of the alcohols • Methanol
• Ethanol
• Propan-2-ol
• Butan-1-ol
• Pentan-1-ol those alcohols were the one chosen. Each differs by CH2 and those are the ones increasing the molecular mass or the alcohols approximatly about 14g more. Three trials will be done for each alcohols.
Dependent Rate of evaporation The rate of evaporation will be represented by the temperautre change over a specific amount of time. It will be measured with a temperature probe on logger pro
Controlled size and type of the sponge Each sponges need to be exactly same to make sure that it will absorb the same amount of alcohol. The size and shape need to be identical and also the sponge need to be tight so it's easy to cut. volume of alcohol For all alcohols, 1cm*3 of alcohol was absorbed by the sponge piece. It needs to be accurate and very precise in order to get good results. temperature The rate of evaporation will increase when the temperature is increasing. All trials need to be done under the same temperature most preferably room …show more content…
The boiling points of the alcohols increase as the number of carbon atoms increases as well as the evaporation rate. So it means that it will take longer to the heavier molecules to reach it’s boiling point which means it will take longer to be transformed into a gas. This experiment isn’t specific enough for us to see If the rate of reaction stops decreasing at point 0 or slows down. Also the carbon chains number won’t make any different because the intermolecular forces of attraction is too strong to let molecules evaporate easily. If the carbon chains are too strong and the molecules too close it won’t be liquid but solid but since the alcohol used are methanol ethanol propan-2-ol butan-1-ol and pentan-ol the linear regression is applied and they are only liquids and not solid yet. This investigation doesn’t show a correlation between evaporation and the carbon chain but just the molecular
How does the molecular mass of alcohols affect its rate of evaporation?
Introduction
Alcohols are some of the most important molecules in organic chemistry. They can be converted into many different types of compounds. Alcohols contain the hydroxyl functional group (-OH), bonded to a carbon atom of an alkyl or substituted alkyl group. The weight of the different compounds will differs because of the amount of hydrogen bonding. There are three kind of alcohols, primary, secondary and tertiary. The alcohols that will be used here will only be part of the primary and secondary group. The 5 alcohols will be Methanol, Ethanol. Propan-2-ol, Butan-1-ol and Pentan-1-ol .
In this experiment we are going to test how alcohol evaporates. …show more content…
How are you measuring?
Independent Molar mass of the alcohols • Methanol
• Ethanol
• Propan-2-ol
• Butan-1-ol
• Pentan-1-ol those alcohols were the one chosen. Each differs by CH2 and those are the ones increasing the molecular mass or the alcohols approximatly about 14g more. Three trials will be done for each alcohols.
Dependent Rate of evaporation The rate of evaporation will be represented by the temperautre change over a specific amount of time. It will be measured with a temperature probe on logger pro
Controlled size and type of the sponge Each sponges need to be exactly same to make sure that it will absorb the same amount of alcohol. The size and shape need to be identical and also the sponge need to be tight so it's easy to cut. volume of alcohol For all alcohols, 1cm*3 of alcohol was absorbed by the sponge piece. It needs to be accurate and very precise in order to get good results. temperature The rate of evaporation will increase when the temperature is increasing. All trials need to be done under the same temperature most preferably room …show more content…
The boiling points of the alcohols increase as the number of carbon atoms increases as well as the evaporation rate. So it means that it will take longer to the heavier molecules to reach it’s boiling point which means it will take longer to be transformed into a gas. This experiment isn’t specific enough for us to see If the rate of reaction stops decreasing at point 0 or slows down. Also the carbon chains number won’t make any different because the intermolecular forces of attraction is too strong to let molecules evaporate easily. If the carbon chains are too strong and the molecules too close it won’t be liquid but solid but since the alcohol used are methanol ethanol propan-2-ol butan-1-ol and pentan-ol the linear regression is applied and they are only liquids and not solid yet. This investigation doesn’t show a correlation between evaporation and the carbon chain but just the molecular