Table 7.2 Boiling Points of the Smallest Hydrocarbons bp (°C) bp (°C) bp (°C) H,C=CH2 -104 ethene CH,CH3 ethane -88.6 HC=CH -84 ethyne CH;CH,CH3 -42.1 CH;CH=CH, -47 CH;C=CH -23 propane propene propyne CH;CH,CH,CH3 -6.5 CH,CH,C3CН 1-butyne -0.5 CH;CH,CH=CH, 1-butene butane CH3CH2CH2C=CH 1-pentyne CH3(CH2);CH3 pentane 36.1 CH;CH,CH,CH=CH; 1-pentene 30 39 CH3(CH2),CH3 hexane 68.7 CH;CH,CH,CH,CH=CH2 1-hexene 63.5 CH3CH,CH,CH,C=CH 1-hexyne 71 CH-CH3 CHCН, cis-2-butene CНС— ССH, 2-butyne 3.7 27 CH;CH=CHCH3 55 0.9 CH;CH,C=CCH3 2-pentyne trans-2-butene

Question

In Table what is the smallest alkane, the smallest terminal alkene, and the smallest terminal alkyne that are liquids at room temperature, which is generally taken to be 20 °C to 25 °C?

Table 7.2
Boiling Points of the Smallest Hydrocarbons
bp (°C)
bp (°C)
bp (°C)
H,C=CH2 -104
ethene
CH,CH3
ethane
-88.6
HC=CH -84
ethyne
CH;CH,CH3
-42.1
CH;CH=CH,
-47
CH;C=CH -23
propane
propene
propyne
CH;CH,CH,CH3
-6.5
CH,CH,C3CН
1-butyne
-0.5
CH;CH,CH=CH,
1-butene
butane
CH3CH2CH2C=CH
1-pentyne
CH3(CH2);CH3
pentane
36.1
CH;CH,CH,CH=CH;
1-pentene
30
39
CH3(CH2),CH3
hexane
68.7
CH;CH,CH,CH,CH=CH2
1-hexene
63.5 CH3CH,CH,CH,C=CH
1-hexyne
71
CH-CH3 CHCН,
cis-2-butene
CНС— ССH,
2-butyne
3.7
27
CH;CH=CHCH3
55
0.9
CH;CH,C=CCH3
2-pentyne
trans-2-butene

Image Transcription

Table 7.2 Boiling Points of the Smallest Hydrocarbons bp (°C) bp (°C) bp (°C) H,C=CH2 -104 ethene CH,CH3 ethane -88.6 HC=CH -84 ethyne CH;CH,CH3 -42.1 CH;CH=CH, -47 CH;C=CH -23 propane propene propyne CH;CH,CH,CH3 -6.5 CH,CH,C3CН 1-butyne -0.5 CH;CH,CH=CH, 1-butene butane CH3CH2CH2C=CH 1-pentyne CH3(CH2);CH3 pentane 36.1 CH;CH,CH,CH=CH; 1-pentene 30 39 CH3(CH2),CH3 hexane 68.7 CH;CH,CH,CH,CH=CH2 1-hexene 63.5 CH3CH,CH,CH,C=CH 1-hexyne 71 CH-CH3 CHCН, cis-2-butene CНС— ССH, 2-butyne 3.7 27 CH;CH=CHCH3 55 0.9 CH;CH,C=CCH3 2-pentyne trans-2-butene

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