1
绗簩绔?/p>
鐞嗘兂姘斾綋鐨勬�ц川
2-1
宸茬煡姘皵鐨勬懇灏旇川閲?/p>
M=28.1
脳
10-3kg/mol
锛屾眰
(1) N2
鐨勬皵浣撳父鏁?/p>
Rg
锛?/p>
(2)
鏍囧噯鐘舵�佷笅
N2
鐨勬瘮浣撶Н
v0
鍜屽瘑搴ο?/p>
0
锛?/p>
(3)
鏍囧噯鐘舵�?/p>
1
绫?/p>
3 N2
鐨勮川
閲?/p>
m0
锛?/p>
(4)p=0.1MPa
锛?/p>
t=500
鈩冩椂
N2
鐨勬瘮浣撶Н
v
鍜屽瘑搴ο?/p>
锛?/p>
(5)
涓婅堪鐘?/p>
鎬佷笅鐨勬懇灏斾綋绉?/p>
Vm
銆?/p>
瑙?/p>
锛?/p>
(1)
閫?/p>
鐢?/p>
姘?/p>
浣?/p>
甯?/p>
鏁?/p>
R=8.3145J/(mol
路
K)
锛?/p>
鐢?/p>
闄?/p>
琛?/p>
鏌?/p>
寰?/p>
MN2
=28.01
脳
10
-3
kg/mol
銆?/p>
RgN2 = R/ M
锛?/p>
8.3145J/(mol
路
K)/ 2
8.01脳10
-3
kg/mol
=0.297 kJ/(kg路K)
(2)1mol
姘皵鏍囧噯鐘舵�佹椂浣撶Н涓?/p>
Vm
N2=Mv N2 =22.4脳10
-3 m 3 /mol
v N2 = Vm N2/ M
锛?2.4脳10
-3
m3/mol/
28.01脳10
-3
kg/mol=0.8m 3 /kg
(
鏍囧噯鐘舵�?/p>
)
蟻
N2 =1/ vN2
锛?/p>
1/0.8m3 / kg=1.25kg/m 3(
鏍囧噯鐘舵�?/p>
)
(3)
鏍囧噯鐘舵�佷笅
1
绫?/p>
3
姘斾綋鐨勮川閲忓嵆涓哄瘑搴?/p>
蟻
锛岀瓑浜?/p>
1.25kg
銆?/p>
(4)
鐢辩悊鎯虫皵浣撶姸鎬佹柟绋嬪紡
pv=RgT
锛屽彲寰?/p>
v= RgT/ p=297J/(kg
路K)脳(500 + 273)K
/
0.1脳106Pa
= 2.296m3/kg
蟻
=1/ v=1/2.296m3 / kg= 0.4356kg/m3
(5)V m =Mv=28.01脳10
-
3 kg/mol 脳 2.296m3/kg=64.29脳10
-3 m 3 /mol
2-2
鍘嬪姏琛ㄦ祴寰楀偍姘旂綈涓笝鐑?/p>
C3H8
鐨勫帇鍔涗负
4.4MPa,
涓欑兎鐨勬俯搴︿负
120
鈩冿紝
闂繖鏃舵瘮浣撶Н澶氬ぇ锛熻嫢瑕佸偍姘旂綈瀛?/p>
1000kg
杩欑鐘舵�佺殑涓欑兎锛?/p>
闂偍姘旂綈鐨勪綋绉渶
澶氬ぇ锛?/p>
瑙ｏ細鐢遍檮琛ㄦ煡寰?/p>
MC3H8 =44.09
脳
10-3kg/mol
Rg,C3H8 =R/ MC3H8=8.3145J/(mol
路
K)/
44.09脳10?3kg/mol
=189J/(kg
路
K)
鐢?/p>
1kg
鐞嗘兂姘斾綋鐘舵�佹柟绋嬪紡
pv=RgT
鍙緱
v =RgT/ p=189J/(kg
路K)脳(120 + 273)K
/
4.4脳106Pa
= 0.01688m3/kg
V=mv=1000kg脳 0.01688m3/kg=16.88m 3
鎴栫敱鐞嗘兂姘斾綋鐘舵�佹柟绋?/p>
pV=mRgT
鍙緱