What is the value of the universal gas constant R in SI units?
A
8.314 J/mol·K
B
0.0821 J/mol·K
C
22.4 J/mol·K
D
1.987 J/mol·K
Correct Answer: Option A — 8.314 J/mol·K
Explanation:
The universal gas constant R equals 8.314 joules per mole per kelvin in SI units, appearing in the ideal gas equation PV=nRT, connecting pressure, volume, moles, and temperature of an ideal gas.