Question

Условия воспламенения веществ:А)Отсутствие воздуха,нагревание.В)Отвод тепла,уменьшение притока воздуха.С)Уменьшение притока воздуха,снижение температуры горения.D)Понижение температуры воспламенения,доступ воздуха.Е)Нагревание до температуры воспламенения,доступ воздуха.

Answer 1

Е)Нагревание до температуры воспламенения,доступ воздуха.

Answer 2

Conditions for Combustion of Substances

There are several conditions that are necessary for the combustion of substances. Let's examine each of the provided options in detail:

A) Absence of air, heating: Combustion requires the presence of oxygen in the air. However, in certain cases, combustion can occur in the absence of air. This is known as "anaerobic combustion" or "pyrolysis." Heating can provide the necessary activation energy for the reaction to occur. B) Heat dissipation, reduced air supply: Combustion can be inhibited by reducing the supply of air or oxygen. Additionally, heat dissipation can prevent the buildup of heat required for sustained combustion. C) Reduced air supply, decreased combustion temperature: By reducing the supply of air or oxygen, the combustion process can be hindered. Lowering the combustion temperature can also impede the reaction. D) Lowering the ignition temperature, access to air: Lowering the ignition temperature of a substance can make it more susceptible to combustion. Additionally, access to air or oxygen is necessary for the reaction to occur. E) Heating to the ignition temperature, access to air: Heating a substance to its ignition temperature can initiate the combustion process. Access to air or oxygen is also crucial for the reaction to take place. It's important to note that the conditions for combustion can vary depending on the specific substance and its properties. The presence of a fuel source, an oxidizer (such as oxygen), and an ignition source are generally required for combustion to occur.

I hope this information helps! Let me know if you have any further questions.