Answer the following questions based on the phase diagram (not to scale!) for ne

Question

Answer the following questions based on the phase diagram (not to scale!) for neon, Ne, and on the following data: Delta H_fussion = 16.6 J/g, Delta H_vap = 84.7 J/g, specific heat gas = 1.03 J/g middot K What is the normal melting point? 24.4 K. The normal boiling point? 27.1 K At what temperature and pressure do the three phases coexist in equilibrium? T = 24.4 K, P = 0.425 atm Is neon a solid, a liquid or a gas at room temperature and pressure? $ If a gas, is it a permanent gas?____________ Which is the more dense phase, the liquid or the solid? solid A 39.6 g sample of liquid neon is heated at a constant pressure of l atm from a temperature of 27.1 K to a temperature of 124.0 K. How much energy in kJ is required? _____kJ

Explanation / Answer

(c) Neon exists as gas at room temperature. No it is not permanent gas, since it is not condensable
(e) Q = m CpT = 39.6 gm * 1.03 J/gm K (124 - 27.1) K = 3952.3572 J
   Energy required = 3952.3572 / 1000 = 3.9523 kJ

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