The quantity of electricity required to liberate 112 cc of hydrogen at STP from acidified water is

Question

The quantity of electricity required to liberate 112 cc of hydrogen at STP from acidified water is (A) 965 C (B) 4825 C (C) 9650 C (D) 96500 C

Tardigrade Admin · Accepted Answer

underset1 text mole H 2 O longrightarrow underset1 text mole of H 22 H ++(1/2) O 2+ underset2 text moles 2 e - 1 mole of H 2=2 Faradays of electricity 22490 cc of H 2=2 × 96500 C 112 cc of H 2=(2 × 96500/22400) × 112 =965 C of electricity

Q. The quantity of electricity required to liberate $112 cc$ of hydrogen at STP from acidified water is

965 C

4825 C

9650 C

96500 C

$1 mole H_{2} O ⟶ 1 mole of H_{2} 2 H^{+} + \frac{1}{2} O_{2} + 2 moles 2 e^{-}$
$1$ mole of $H_{2} = 2$ Faradays of electricity
$22490 cc$ of $H 2 = 2 \times 96500 C$
$112 cc$ of $H_{2} = \frac{2 \times 96500}{22400} \times 112$
$= 965 C$ of electricity

Q. The quantity of electricity required to liberate 112cc of hydrogen at STP from acidified water is