Callen H.B - Thermodynamics And An Introduction To Thermostatistics · Problem 9.3-5

FIRST-ORDER PHASE TRANSITIONS

Physics — Statistical Mechanics · ammonia-triple-point

Problem

In the vicinity of the triple point the vapor pressure of liquid ammonia (in Pascals) is represented by ln⁡P=24.38−3063T\ln P = 24.38 - \frac{3063}{T} This is the equation of the liquid--vapor boundary curve in a PP--TT diagram. Similarly, the vapor pressure of solid ammonia is ln⁡P=27.92−3754T\ln P = 27.92 - \frac{3754}{T} What are the temperature and pressure at the triple point? What are the latent heats of sublimation and vaporization? What is the latent heat of fusion at the triple point?

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