What happens when you reheat coffee

When you reheat coffee, the chemical composition of the coffee can change, and this can affect its flavor and aroma. Coffee contains many volatile organic compounds (VOCs) that contribute to its taste and aroma, including aldehydes, ketones, and esters. When coffee is brewed, these compounds are released into the air and give coffee its characteristic smell. However, when coffee is reheated, these VOCs can break down and evaporate, reducing the coffee's aroma and flavor. At the same time, other chemical reactions can occur, such as the breakdown of sugars and amino acids, which can lead to the development of off-flavors. Reheating coffee can also cause the coffee to lose some of its natural oils and acidity. When coffee is brewed, it contains natural oils that give it a rich, smooth texture. However, when coffee is reheated, these oils can evaporate or break down, which can make the coffee taste thinner and less flavorful. Additionally, coffee has a pH of around 5, which means it...