Calculate the volume in cm3 of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s {F = 96500 Cmol-1, Molar volume of ...
Question 1 Report
Calculate the volume in cm3 of oxygen evolved as s.t.p. when a current of 5 A is passed through acidified water for 193s
{F = 96500 Cmol-1, Molar volume of a gas at s.t.p. = 22.4 dm3}
Answer Details
The volume of oxygen evolved can be calculated using the formula:
Volume of gas = (Current × Time × Molar volume of gas at s.t.p.) / (2 × Faraday constant)
where current is in amperes, time is in seconds, the molar volume of gas at s.t.p. is 22.4 dm³/mol, and the Faraday constant is 96500 C/mol.
Plugging in the given values, we get:
Volume of gas = (5 A × 193 s × 22.4 dm³/mol) / (2 × 96500 C/mol)
= 0.056 dm³
Therefore, the volume of oxygen evolved is 0.056 dm³ or 56 cm³.
So, the correct answer is option (B) 0.056 dm³.
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