unit 2 investigation 4: where does all the energy in an explosion come from?\nelectrolysis of water versus…
unit 2 investigation 4: where does all the energy in an explosion come from?\nelectrolysis of water versus hydrogen and oxygen filled balloon explosion\nthe equation for the reaction in the hydrogen and oxygen balloon is\nh₂ + o₂→h₂o\nquestion #11\ncompare these two reactions.\nwhat is happening to the atoms in the electrolysis of water reaction and the atoms in the hydrogen and oxygen balloon reaction?\nquestion #12\nin the electrolysis reaction, if you removed the tacks from the battery, the reaction stopped. use your understanding of what happens to atoms in this reaction and energy to explain why the reaction would stop when removed from the battery.\nthe equation for the electrolysis of water reaction you did with a battery in investigation 3 is\nh₂o→h₂ + o₂
Answer
Explanation:
Step1: Analyze electrolysis of water reaction
In the electrolysis of water ($H_2O\rightarrow H_2 + O_2$), water molecules are broken - down. The electrical energy from the battery provides the energy needed to break the chemical bonds in water. Hydrogen and oxygen atoms that were bonded in water molecules are separated to form hydrogen gas ($H_2$) and oxygen gas ($O_2$).
Step2: Analyze hydrogen - oxygen balloon reaction
In the reaction $H_2+O_2\rightarrow H_2O$, hydrogen and oxygen gases react to form water. Hydrogen and oxygen atoms combine to form new water molecules, releasing energy in the form of heat and light (explosion). Chemical bonds are formed between hydrogen and oxygen atoms.
Step3: Answer question #12
In the electrolysis reaction, the battery supplies electrical energy. This energy is used to break the chemical bonds in water molecules. When the tacks are removed from the battery, there is no source of electrical energy. Without this energy, the chemical bonds in water cannot be broken, so the reaction stops as there is no driving force to separate the hydrogen and oxygen atoms in water molecules.
Answer:
For question #11: In the electrolysis of water, water molecules are broken into hydrogen and oxygen atoms which form gases. In the hydrogen - oxygen balloon reaction, hydrogen and oxygen atoms combine to form water molecules. For question #12: The battery supplies electrical energy to break the bonds in water molecules in electrolysis. Without the battery, there is no energy source to break these bonds, so the reaction stops.