Question

Отметь, какое из утверждений верно для реакции: CaCO3=CaO+CO2−Q. 1) Все варианты подходят 2)Не происходит изменение энергии 3)Тепловой эффект реакции невозможно определить экспериментально 4)Реакция происходит с поглощением тепла​

Answer 1

Ответ:

4) Реакция протекает с выделением тепла;

Answer 2

Ответ:

3)

это 100% правильно

пиши лучше 3

Answer 3

Statement Analysis:

The given reaction is: CaCO3 = CaO + CO2

Let's analyze each statement to determine which one is correct:

1) All options are suitable. 2) There is no change in energy. 3) The thermal effect of the reaction cannot be determined experimentally. 4) The reaction occurs with the absorption of heat.

Correct Statement:

Based on the given reaction, the correct statement is Statement 4: The reaction occurs with the absorption of heat.

Explanation:

The given reaction represents the thermal decomposition of calcium carbonate (CaCO3) into calcium oxide (CaO) and carbon dioxide (CO2). This reaction is an endothermic reaction, meaning it requires the absorption of heat energy to proceed. As a result, the reaction absorbs heat from the surroundings.

Therefore, the correct statement is that the reaction occurs with the absorption of heat.