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White phosphorus, P4, is normally a white, waxy solid melting at 44 °C to a colorless...

White phosphorus, P4, is normally a white, waxy solid melting at 44 °C to a colorless liquid. The liquid has a vapor pressure of 400.0 mm Hg at 251.0 °C and 760.0 mm Hg at 280.0 °C. Use this information to calculate the heat of vaporization of this substance. Be sure to enter a unit with your answer.

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Answer #1

According to clausius clapeyron equation

given P1=400 mm of Hg = 0.526atm ; T1=251oC=524K

P2=760mm of Hg = 1 atm; T2=280oC=553K

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