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Use the phase diagram of neon to answer the following questions.
TABLE 1 1 .5 Critical
Temperatures and Pressures
of Selected Substances
Substance
Critical Temperature (K)
Critical
Pressure (atm)
Nitrogen, N2
126.1
335
Argon, Ar
150.9
48.0
Oxygen, 02
154.4
49.7
Methane, CH4
190.0
45.4
Carbon dioxide, CO2
304.3
73.0
Phosphine, PH3
324.4
645
Propane, CH3CH2CH3
370.0
42.0
Hydrogen sulfide, H2S
373.5
88.9
Ammonia, NH3
405.6
111.5
Water, H2O
647.6
217.7
(a)What is the approximate value of the normal boiling point?
(b) What can you say about the strength of the intermolecular forces in neon and argon based on the critical points of Ne and Ar?
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