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A mixture of 2 dm³ of hydrogen and 1 dm³ of oxygen is at room temperature - AQA - A-Level Chemistry - Question 18 - 2021 - Paper 3
Question 18
A mixture of 2 dm³ of hydrogen and 1 dm³ of oxygen is at room temperature. Which statement is correct? A There is no reaction to form water because the molecules ... show full transcript
Worked Solution & Example Answer:A mixture of 2 dm³ of hydrogen and 1 dm³ of oxygen is at room temperature - AQA - A-Level Chemistry - Question 18 - 2021 - Paper 3
Step 1
A There is no reaction to form water because the molecules do not collide with sufficient energy.
Answer
This statement is correct because, in order for water to form from hydrogen and oxygen, the molecules must collide with enough energy to overcome the activation energy barrier for the reaction. At room temperature and without an external ignition source, the kinetic energy of the molecules may not be sufficient to initiate the reaction.