Question

The densities of graphite and diamond at $298\, K$ are $2.25$ and $3.31\, g\, cm^{-3},$ respectively. If the standard free energy difference $(\Delta G^{\circ})$ is equal to $1895\, J\, mol^{-1}$, the pressure at which graphite will be transformed into diamond at $298\, K$ is -

• A. $9.92 \times 10^8 \, Pa$
• B. $9.92 \times 10^7 \, Pa$
• C. $9.92 \times 10^6 \, Pa$
• D. $9.92 \times 10^5 \, Pa$

Answer 1

Answer: (A)

$9.92 \times 10^8 \, Pa$

Answer 2

The pressure at which graphite will be transformed into diamond at 298K is

$9.92 \times 10^8 \; Pa$