1
绗?/p>
1
绔?/p>
鍖栧鐑姏瀛﹀熀鏈畾寰?/p>
1
锛?/p>
1mol
鍙屽師瀛愮悊鎯虫皵浣撳湪
300 K
銆?/p>
101 kPa
涓嬶紝
缁忔亽澶栧帇鎭掓俯鍘嬬缉鑷冲钩琛℃�侊紝骞朵粠姝ょ姸鎬佷笅
鎭掑鍗囨俯鑷?/p>
370 K
銆佸帇寮轰负
1 010 kPa
銆傛眰鏁翠釜杩囩▼鐨?/p>
U
飦?/p>
銆?/p>
H
飦?/p>
銆?/p>
W
鍙?/p>
Q
銆?/p>
顎婎�?/p>
锛堢瓟妗堬細鈻?/p>
U = 1455 J
锛屸柍
H = 2037 J
锛?/p>
W=17727 J
锛?/p>
Q = -16272 J
锛?/p>
瑙ｏ細
绗竴姝ワ細鎭掑鍘嬫亽娓╁帇缂╄嚦骞宠 鎬侊紝
U
飦?/p>
=0
锛?/p>
H
飦?/p>
=0
V
1
=8.314
脳
300/101=24.695dm
3
,
姝ゅ钩琛℃�佺殑浣撶Н灏辨槸鏈�佺殑浣撶Н
V
2
锛?/p>
V
2
=8.314
脳
370/1010= 3.046dm
3
姝ゅ钩琛℃�佺殑鍘嬪己
P鈥?8.314
脳
300/(3.046
脳
10
-3
)=818.84kPa
W=-
P鈥?V
2
-V
1
)=-818.92
脳
10
3
脳
(3.046-24.695)
脳
10
-3
=17727 J=17.727 kJ
-Q=W=17.727 kJ
Q=-17.727 kJ
绗竴姝ワ細
鍥犳亽瀹?/p>
W=0
U
飦?/p>
=Q
v
=C
v,m
(T
2
-T
1
)
=20.79
脳
(370-300)=1455.3 J=1.455 kJ
H
飦?/p>
=(20.79+R)
脳
70=2037.3 J=2.037 kJ
鏁翠釜杩囩▼锛?/p>
W=17.727 kJ
锛?/p>
Q= -17.727+1.455= -16.27 kJ
锛?/p>
U
飦?/p>
=1.455 kJ
锛?/p>
H
飦?/p>
=2.037 kJ
銆?/p>
2
锛?/p>
璁炬湁
0.1 kg N
2
锛?/p>
娓╁害涓?/p>
273.15 K
锛?/p>
鍘嬪己涓?/p>
101325 Pa
锛?/p>
鍒嗗埆杩涜涓嬪垪杩囩▼锛?/p>
姹?/p>
U
飦?/p>
銆?/p>
H
飦?/p>
銆?
Q
鍙?/p>
W
銆?/p>
顎?/p>
(1)
鎭掑鍔犵儹鑷冲帇寮轰负
151987.5 Pa
锛?/p>
(2)
鎭掑帇鑶ㄨ儉鑷冲師浣撶Н鐨?/p>
2
鍊嶏紱
(3)
鎭掓俯鍙�嗚啫鑳�鑷冲師浣撶Н鐨?/p>
2
鍊嶏紱
(4)
缁濈儹鍙�嗚啫鑳�鑷冲師浣撶Н鐨?/p>
2
鍊嶃�?/p>
顎?/p>
锛堢瓟妗堬細
鈶犫柍
U = Q
V
= 1.01
脳
10
4
J
锛屸柍
H = 1.42
脳
10
4
J
锛?/p>
W = 0
锛?/p>
鈶♀柍
H = Q
P
= 28.4 kJ
锛屸柍
U = 20.20 kJ
锛?/p>
W= -8.11 kJ
锛?/p>
鈶?/p>
Q = 5622 J
锛?/p>
W = -5622 J
锛屸柍
H =
鈻?/p>
U = 0 J
锛?/p>
鈶?/p>
Q = 0
锛?/p>
W =
鈻?/p>
U = -4911 J
锛屸柍
H = - 6875 J
锛?/p>
瑙ｏ細
灏?/p>
N
2
姘旇涓哄弻鍘熷瓙鐞嗘兂姘斾綋锛屽垯
C
p,m
=29.10 J
路
mol
-1
路
K
-1
;
C
v,m
=20.79 J
路
mol
-1
路
K
-1
(1)
W=0,
鏈�佹俯搴?/p>
T
2
=1.5T
1
=1.5
脳
273.15 K
鈭?/p>
U
飦?/p>
=Q
v
=n C
v
(T
2
-T
1
) =(100/28)
脳
20.79
脳
(1.5
脳
273.15-273.15)=1.01
脳
10
4
J