(Originais Teachy 2023) - Question Hard of Sciences

The air we breathe is a mixture of gases, with nitrogen and oxygen being the most abundant. In a chemical reaction, the composition of the air can be altered, such as when a candle burns, consuming oxygen and emitting carbon dioxide. Imagine you are in a chemistry lab and are tasked with investigating the effects of burning a candle on the composition of the air. Use your knowledge of chemistry and the information provided to answer the following questions: 1. Based on the burning reaction of a candle (C25H52 + 38O2 -> 25CO2 + 26H2O), and knowing that the air is composed of approximately 21% oxygen, calculate the amount of oxygen consumed and the amount of carbon dioxide and water produced when a candle burns completely in a 1-liter volume of air. Disregard the presence of other gases in the air in the reaction. 2. Discuss how the burning of the candle can affect the air quality in a closed environment, considering not only the decrease in oxygen but also the addition of carbon dioxide and the increase in temperature. Relate these effects to possible consequences for human health and environmental balance.