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What is the value of universal gas constant in Nernst equation when the potential is given in volts?(a) 8.314 J mol^-1K^-1(b) 0.0821 L atm mol^-1K^-1(c) 8.205 m^3 atm mol^-1K^-1(d) 1.987 cal mol^-1K^-1The question was posed to me in exam.My doubt stems from Electrochemistry topic in portion Electrochemistry of Chemistry – Class 12

Answer»

The CORRECT choice is (a) 8.314 J mol^-1K^-1

The best I can explain: The universal gas CONSTANT is DENOTED by R and is expressed in units of ENERGY per temperature per mole. Since volts is the SI-Unit of potential, R must also be taken in SI-Units which is J mol^-1K^-1.



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