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Phosphorus exists as several allotropes that have varying properties. The enthalpy of transition from white P...

Phosphorus exists as several allotropes that have varying properties. The enthalpy of transition from white P to red P, ΔtransH, is -18 kJ/mol. The densities of white and red phosphorus are 1.823 and 2.270 g/cm3, respectively. At what temperature does white phosphorus become the stable phase at 625 atm of pressure? Assume the formula for phosphorus is P4.

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