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The densities of graphite and diamond at 298 K are 2.25 and 3.31g cm–3, respectively. If the standard free energy difference (ΔGº) is equal to 1895 J mol–1, the pressure at which graphite will be transformed into diamond at 298 K is [2003]
  • a)
    9.92 × 105 Pa
  • b)
    9.92 × 108 Pa
  • c)
    9.92 × 107 Pa
  • d)
    9.92 × 106 Pa
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
The densities of graphite and diamond at 298 K are 2.25 and 3.31g cm&n...
ΔG = – PΔV = Work done
ΔV is the change in molar volume in the conversion of graphite to diamond.

Work done = –(–1.91 × 10–3) × P × 101.3 J

1 atm = 105 × 1.013 Pa
⇒ P = 9.92 x 108 Pa
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Most Upvoted Answer
The densities of graphite and diamond at 298 K are 2.25 and 3.31g cm&n...
To fully answer your question, we need to know the complete units for the densities of graphite and diamond at 298 K. The units for density are typically expressed as mass per unit volume.

Assuming the units for density of graphite and diamond at 298 K are grams per cubic centimeter (g/cm³), the given densities are:

- Graphite density at 298 K: 2.25 g/cm³
- Diamond density at 298 K: 3.31 g/cm³
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The densities of graphite and diamond at 298 K are 2.25 and 3.31g cm–3, respectively. If the standard free energy difference (ΔGº) is equal to 1895 J mol–1, the pressure at which graphite will be transformed into diamond at 298 K is [2003]a)9.92 × 105 Pab)9.92 × 108 Pac)9.92 × 107 Pad)9.92 × 106 PaCorrect answer is option 'B'. Can you explain this answer?
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