zračenje-segrevanje

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goba
Posts: 11
Joined: 15.1.2006 19:22

zračenje-segrevanje

Post by goba » 15.1.2006 19:41

em, zanima me, če je moje opažanje, da se prezračena soba bolj ogreje(ko se ogreje), kot če maš notri "slab zrak", pravilno. Oziroma, če se ga da kako znanstveno podpreti.

Sama sem razmišljala nekak v smeri, da je v svežem zraku več o2 in manj co2. Ker je (molska?) masa o2<co2, je verjetno treba manj E, da za isto spremembo T segreješ isto prostornino..... ??
bi lahko mogoče kdo s kako enačbico postregel?! :wink:

seba
Posts: 40
Joined: 27.1.2006 2:46
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Post by seba » 27.1.2006 4:15

CO2
# Heat capacity at constant pressure (Cp) (1.013 bar and 25 °C (77 °F)) : 0.037 kJ/(mol.K)
# Heat capacity at constant volume (Cv) (1.013 bar and 25 °C (77 °F)) : 0.028 kJ/(mol.K)
# Ratio of specific heats (Gamma:Cp/Cv) (1.013 bar and 25 °C (77 °F)) : 1.293759
# Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 14.65 mW/(m.K)

O2
# Heat capacity at constant pressure (Cp) (1 bar and 25 °C (77 °F)) : 0.029 kJ/(mol.K)
# Heat capacity at constant volume (Cv) (1 bar and 25 °C (77 °F)) : 0.021 kJ/(mol.K)
# Ratio of specific heats (Gamma:Cp/Cv) (1 bar and 25 °C (77 °F)) : 1.393365
# Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 24.24 mW/(m.K)

N2
# Heat capacity at constant pressure (Cp) (1.013 bar and 25 °C (77 °F)) : 0.029 kJ/(mol.K)
# Heat capacity at constant volume (Cv) (1.013 bar and 25 °C (77 °F)) : 0.02 kJ/(mol.K)
# Ratio of specific heats (Gamma:Cp/Cv) (1.013 bar and 25 °C (77 °F)) : 1.403846
# Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 24 mW/(m.K)

Air
# Heat capacity at constant pressure (Cp) (1.013 bar and 21 °C (70 °F)) : 0.029 kJ/(mol.K)
# Heat capacity at constant volume (Cv) (1.013 bar and 21 °C (70 °F)) : 0.02 kJ/(mol.K)
# Ratio of specific heats (Gamma:Cp/Cv) (1.013 bar and 21 °C (70 °F)) : 1.4028
# Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 23.94 mW/(m.K)

CH4 (če imaš prebavne težave)
# Heat capacity at constant pressure (Cp) (1 bar and 25 °C (77 °F)) : 0.035 kJ/(mol.K)
# Heat capacity at constant volume (Cv) (1 bar and 25 °C (77 °F)) : 0.027 kJ/(mol.K)
# Ratio of specific heats (Gamma:Cp/Cv) (1 bar and 25 °C (77 °F)) : 1.305454
# Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 32.81 mW/(m.K)

H2S (če ti smrdi grozno iz ust)
# Specific volume (1.013 bar and 21 °C (70 °F)) : 0.699 m3/kg
# Heat capacity at constant pressure (Cp) (1 bar and 25 °C (77 °F)) : 0.034 kJ/(mol.K)
# Thermal conductivity (1.013 bar and 0 °C (32 °F)) : 12.98 mW/(m.K)

vir: http://www.airliquide.com/en/business/p ... /index.asp

vode nimajo tam, če maš dosti vlage pa to.
thermal conductivity, Water 0.606

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