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What is the numerical value of the universal gas constant R?

1. 0.082 litre atm
2. 0.987 cal mol⁻¹ K⁻¹
3. 8.3 J mol⁻¹ K⁻¹
4. 83 erg mol⁻¹ K⁻¹

Correct answer: 8.3 J mol⁻¹ K⁻¹

Solution

The universal gas constant R is defined as 8.314 J mol⁻¹ K⁻¹, which is commonly rounded to 8.3 J mol⁻¹ K⁻¹ for simplicity in calculations, making option C the correct choice.

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