TABLE 11.5 Critical Temperatures and Pressures of Selected Substances Substance Critical Temperature (K) Critical Pressure (atm) Nitrogen, N2 126.1 33.5 Argon, Ar 150.9 48.0 Oxygen, O2 154.4 49.7 Methane, CH, 190.0 45.4 Carbon dioxide, CO, 304.3 73.0 Phosphine, PH, 324.4 64.5 Propane, CH,CH½CH3 370.0 42.0 Hydrogen sulfide, H2S 373.5 88.9 Ammonia, NH3 405.6 111.5 Water, H20 647.6 217.7

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Why are the critical temperature and pressure for H2O so much higher than those for H2S, a related substance

TABLE 11.5 Critical Temperatures and Pressures of Selected Substances
Substance
Critical Temperature (K)
Critical Pressure (atm)
Nitrogen, N2
126.1
33.5
Argon, Ar
150.9
48.0
Oxygen, O2
154.4
49.7
Methane, CH,
190.0
45.4
Carbon dioxide, CO,
304.3
73.0
Phosphine, PH,
324.4
64.5
Propane, CH,CH½CH3
370.0
42.0
Hydrogen sulfide, H2S
373.5
88.9
Ammonia, NH3
405.6
111.5
Water, H20
647.6
217.7
Transcribed Image Text:TABLE 11.5 Critical Temperatures and Pressures of Selected Substances Substance Critical Temperature (K) Critical Pressure (atm) Nitrogen, N2 126.1 33.5 Argon, Ar 150.9 48.0 Oxygen, O2 154.4 49.7 Methane, CH, 190.0 45.4 Carbon dioxide, CO, 304.3 73.0 Phosphine, PH, 324.4 64.5 Propane, CH,CH½CH3 370.0 42.0 Hydrogen sulfide, H2S 373.5 88.9 Ammonia, NH3 405.6 111.5 Water, H20 647.6 217.7
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