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Question

The value of universal gas constant is

A
8.03 J mol1 K1
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B
8.31 J mol1 K1
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C
3.81 J mol1 K1
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D
1.38 J mol1 K1
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Solution

The correct option is B 8.31 J mol1 K1
R is the ideal, or universal, gas constant, equal to the product of the Boltzmann constant and the Avogadro constant:

R=μnAkB=8.31 J mol1 K1

where,
  • μ is the number of moles of the gas present
  • NA is the Avogadro's number =6.023×1023 atoms per mole
  • kB is the Boltzmann's constant =1.38×1023 J K1

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