State whether the following statements are true or false.
The importance of using H2 O2 cell in jet engines;
a)because it doesn't release gasses which cause Greenhouse Effect
b)because it doesn't release gasses which cause Ozone layer depletion
The answer key states b is false as the cell release H2O vapour which cause Greenhouse Effect.
But from what I've learned the reactions occur in the cell are as follows;
2 H2(g) + 4 OH^-(aq) --> 4H2O(l) + 4e
O2(g)+2H2O(l)+4e-->4 OH^-(aq)
Cell reaction :
2H2(g) + O2(g) -->2H2O(l)
Maybe the liquid water, is turning to vapour when the engine is active??
I agree
To determine whether the statements are true or false, you need to understand the reactions and their impact on the environment.
In the given reactions, the H2 O2 cell combines hydrogen gas (H2) and oxygen gas (O2) to form water (H2O). This process does not release gases that cause Greenhouse Effect or Ozone layer depletion directly.
To evaluate the statements:
a) "Because it doesn't release gases which cause Greenhouse Effect."
The H2 O2 cell reaction does not directly release greenhouse gases, such as carbon dioxide (CO2) or methane (CH4), which are major contributors to the Greenhouse Effect. Therefore, the statement is true.
b) "Because it doesn't release gases which cause Ozone layer depletion."
The H2 O2 cell reaction does not release gases that directly deplete the ozone layer, such as chlorofluorocarbons (CFCs). Therefore, the statement appears to be true.
However, it is important to note that the H2 O2 cell reaction produces water vapor (H2O) as one of its products. In large quantities, water vapor can contribute to the Greenhouse Effect because it absorbs and traps heat in the Earth's atmosphere. While water vapor itself is not considered a greenhouse gas as it does not persist for long periods, it can enhance the effect of other greenhouse gases.
So, although statement b is true in the context of not directly releasing chemicals that deplete the ozone layer, it is false when considering the indirect impact of water vapor on the Greenhouse Effect.