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JEE Main levelNumerical answerDifficulty 1 of 3ec13

Using $Δ_{r} G^{\circ} = - 237 kJ mo l^{- 1}$ for $H X_{2} + \frac{1}{2} O X_{2} H X_{2} O (l)$ , the standard EMF of the hydrogen-oxygen fuel cell (in V, two decimals) is.

Numerical answer type, answer in V, tolerance 0.01.

Answer: 1.23 V

n = 2

per mole of

H X_{2}

.

E^{\circ} = - \frac{Δ G ^{\circ}}{n F} = \frac{237000}{2 \times 96500} = 1.228 \approx 1.23 V

.

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