# HW_G - Homework G PHY3513 Due 1(28.1 2 Consider the...

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Homework G PHY3513 Due: April 20, 2011 1. (28.1) 2. Consider the isotherm at T as shown in the figure. At the point A , the substance is a mixture of liquid and vapor. Suppose that the masses of liquid and vapor are m l and m v , respectively, and m = m l + m v . The volume occupied by the mixture at A is m l v l + m v v ) l v where v l and v v are the specific volumes of the liquid and vapor. Show that ()( llv mv v ν −= . This relation is known as the lever rule . The ratio is gives you the quality of the mixture. / v mm liquid A vapor V p 3. Show using the Clausius-Clapeyron equation for melting that the ice point of water (273.15 K) at atmospheric pressure is 0.01 K below the triple point (273.16 K) which occurs at a pressure of 4.58 Torr. The density of pure water is 1000 kg m -3 and the density of ice is 916 kg m -3 . The latent heat of melting is 3.34 × 10 5 J kg -1 . 4. The equations of the sublimation and vaporization curves of a particular substance are given by: l n p = 0.04 – 6/ T (sublimation) l n p = 0.03 – 4/ T (vaporization) where p is in atmospheres.

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HW_G - Homework G PHY3513 Due 1(28.1 2 Consider the...

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