Question

разделить на группы - физические и химические. Записать в тетрадь. Таяние снега, горение свечи, дыхание человека, рассвет, ржавление железа, разведение концентрированной серной кислоты, образование инея, движение облаков по небу, сжигание фосфора, северное сияние, ледостав, стрекотание кузнечика, получение соляной кислоты, окисление меди.​

Answer 1

Объяснение:

химические явления: , ржавление железа,разведение концентрированной серной кислоты,сжигание фосфора,получение соляной кислоты,окисление меди

физические явления:таяние снега, горение свечи, дыхание человека, рассвет,образование инея, движение облаков по небу,северное сияние,ледостав,стрекотание кузнечика,

Answer 2

Ответ:

Физические: таяние снега, рассвет, образование инея, движение облаков по небу, северное сияние, ледостав, стрекотание кузнечика

Химические: горение свечи, дыхание человека, ржавление железа, разведение концентрированной серной кислоты, сжигание фосфора, получение соляной кислоты, окисление меди.

Объяснение: вот

Answer 3

Grouping of Physical and Chemical Changes

When categorizing the given phenomena into physical and chemical changes, it's important to understand the differences between the two types of changes.

Physical changes involve changes in the physical state or form of a substance without altering its chemical composition. Examples of physical changes include melting of snow, formation of frost, movement of clouds, and the formation of ice.

Chemical changes, on the other hand, involve the formation of new substances with different chemical compositions. Examples of chemical changes include burning of a candle, rusting of iron, burning of phosphorus, and formation of salt.

Now, let's categorize the given phenomena into physical and chemical changes based on the provided examples.

1. Tаяние снега (Melting of snow) - This is a physical change as it involves a change in the physical state of water without altering its chemical composition. 2. Горение свечи (Burning of a candle) - This is a chemical change as it involves the combustion of wax in the candle, leading to the formation of new substances such as carbon dioxide and water vapor. 3. Дыхание человека (Breathing of a human) - This is a physical change as it involves the exchange of gases in the respiratory system without altering the chemical composition of the gases. 4. Рассвет (Sunrise) - This is a physical change as it involves the change in the position of the sun and the resulting illumination without any alteration in chemical composition. 5. Ржавление железа (Rusting of iron) - This is a chemical change as it involves the reaction of iron with oxygen and water to form iron oxide. 6. Разведение концентрированной серной кислоты (Dilution of concentrated sulfuric acid) - This is a physical change as it involves the addition of water to the acid without altering its chemical composition. 7. Образование инея (Formation of frost) - This is a physical change as it involves the deposition of water vapor on surfaces without any chemical alteration. 8. Движение облаков по небу (Movement of clouds) - This is a physical change as it involves the movement and transformation of water vapor in the atmosphere without any chemical transformation. 9. Сжигание фосфора (Burning of phosphorus) - This is a chemical change as it involves the combustion of phosphorus, leading to the formation of new compounds such as phosphorus pentoxide. 10. Северное сияние (Northern lights) - This is a physical change as it involves the interaction of charged particles from the sun with the Earth's atmosphere, resulting in the emission of light without any chemical transformation. 11. Ледостав (Formation of ice) - This is a physical change as it involves the freezing of water without any alteration in chemical composition. 12. Стрекотание кузнечика (Chirping of a cricket) - This is a physical change as it involves the production of sound without any chemical transformation. 13. Получение соляной кислоты (Formation of hydrochloric acid) - This is a chemical change as it involves the reaction of hydrogen chloride gas with water to form hydrochloric acid. 14. Окисление меди (Oxidation of copper) - This is a chemical change as it involves the reaction of copper with oxygen to form copper oxide.

By categorizing these phenomena into physical and chemical changes, it becomes clear how different processes can be classified based on their underlying characteristics.