The value of R ( Universal Gas Constant ) = ___________?
Correct answer: A. 8.314 J/mole K
- A. 8.314 J/mole K
- B. 6.5 J/mole K
- C. 1.314 J/mole K
- D. 10.314 J/mole K
Explanation
The universal gas constant has the value R = 8.314 J mol^-1 K^-1, equivalently 8.314 J/(mol K). It appears in the ideal-gas equation PV = nRT, where pressure times volume has units of joules. Students may choose 10.314 because they may round or alter the standard constant without a valid calculation.
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About Molar Specific Heat of a Gas
Molar specific heat is the heat required to raise the temperature of one mole of a gas by one kelvin, expressed through Q = nCΔT. Questions compare the constant volume value Cv with the constant pressure value Cp, apply the ideal gas relation Cp − Cv = R, and identify how the thermodynamic process affects heat capacity.
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