[FUVEST 2019/Q42] O cinamaldeído é um dos principais compostos que dão o sabor e o aroma da canela.

Summary

This video explains the oxidation process of sinaldeído, a compound responsible for cinnamon's flavor and aroma. Through a balanced chemical equation, the presenter details how sinaldeído reacts with oxygen, resulting in a mass increase due to the incorporation of oxygen. After exposing a sample to air for 74 days, the mass increased by 1.20 grams, leading to calculations showing that 9.90 grams of sinaldeído were oxidized. Ultimately, the video concludes that 50% of the initial sample was oxidized, illustrating key concepts in stoichiometry and mass conservation in chemistry.

Takeaways

• 😀 Cinnamaldehyde is a key compound that provides the flavor and aroma of cinnamon.
• 😀 The oxidation process of cinnamaldehyde was studied over a period of 74 days.
• 😀 The initial mass of pure cinnamaldehyde was 19.80 grams, which increased by 1.20 grams after oxidation.
• 😀 The balanced chemical equation indicates that 132 grams of cinnamaldehyde react with oxygen.
• 😀 For every 132 grams of cinnamaldehyde oxidized, 16 grams of oxygen are required.
• 😀 The total mass after oxidation is calculated to be 148 grams, indicating a mass gain due to oxygen incorporation.
• 😀 The oxidation results in the formation of a carboxylic acid product.
• 😀 The problem-solving approach used stoichiometric relationships to determine the mass oxidized.
• 😀 A calculation revealed that 9.9 grams of cinnamaldehyde were oxidized during the experiment.
• 😀 Ultimately, the percentage of cinnamaldehyde that was oxidized was found to be 50%.

Q & A

What compound is primarily discussed in the transcript?

The compound discussed is sinaldehyde, which is responsible for the flavor and aroma of cinnamon.

What happens to sinaldehyde when it is exposed to air?

When sinaldehyde is exposed to air, it undergoes oxidation.

What was the initial mass of the sinaldehyde sample?

The initial mass of the sinaldehyde sample was 19.80 grams.

By how much did the mass of the sinaldehyde sample increase after oxidation?

The mass of the sinaldehyde sample increased by 1.20 grams after oxidation.

What is the molar mass of sinaldehyde?

The molar mass of sinaldehyde is 132 g/mol.

What is the molar mass of oxygen (O2)?

The molar mass of oxygen (O2) is 32 g/mol.

How much oxygen is required to oxidize 132 grams of sinaldehyde?

To oxidize 132 grams of sinaldehyde, 16 grams of oxygen are required.

How is the relationship between the increase in mass and the oxidized sinaldehyde calculated?

The relationship is calculated using stoichiometry, where an increase of 16 grams corresponds to the oxidation of 132 grams of sinaldehyde.

What percentage of the sinaldehyde sample was oxidized during the experiment?

50% of the sinaldehyde sample was oxidized during the exposure to air.

What principle is applied to deduce the final mass after oxidation?

The principle of conservation of mass is applied to deduce the final mass after oxidation.