Question
In: Chemistry
How much energy would be needed to make 10.0 grams of oxygen gas from water?
How much energy would be needed to make 10.0 grams of oxygen gas from water?
Solutions
Expert Solution
Ans : 178.625 kJ
The reaction is
H2O (l) --------> H2 (g) + 1/2O2 (g) : ΔH =285.8kJ/mol
no of mole of O2 produced = 10 / 32 mol
since ,when 0.5 mole O2 produce from water then 285.8kJ energy was required
so, 10/32 mole O2 produced from water require =285.8/0.5 x10/32 kJ
= 178.625 kJ
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