Question

The value of $R$ in SI units is ________.

• A. $8.314joules$ ${mol}^{-1}$ $K^{-1}$
• B. $4.18joules$ ${mol}^{-1}$ $K^{-1}$
• C. $3.14joules$ ${mol}^{-1}$ $K^{-1}$
• D. none of these

Answer 1

The correct option is A $8.314joules$ ${mol}^{-1}$ $K^{-1}$

The Gas Constant is the constant in the equation for the Ideal Gas Law: $PV=nRT$, where $P$ is pressure, $V$ is volume, $n$ is number of moles, and $T$ is temperature.

The value of the gas constant ${}^{\prime }{R}^{\prime }$ depends on the units used for pressure, volume and temperature.

$R=8.3145J/mol\cdot K$