化学反应CaCO3(s)=CaO(s)+CO2(g)必须在高温下进行,请用热力学原理解释之。
化学反应CaCO3(s)=CaO(s)+CO2(g)必须在高温下进行,请用热力学原理解释之。
相关考题:
化学反应 CaCO3(s)=CaO(s)+CO2(g)的()A△H>0,△S>0B△H>0,△S0D△H& 化学反应 CaCO3(s)=CaO(s)+CO2(g)的()A△H>0,△S>0B△H>0,△SC△H0D△H
下列过程说明合法的是( ) A、Sub S1(ByVal n!())B、Sub S1(n!) as IntegerC、 Function S1%(S1%)D、 Function S1(ByVal n!)
阅读如下程序, a = 1: b = 2: plus S, a, b: Print S:不能使其输出结果为3的plus过程为( )。 A、Sub plus(sum, a , b ): sum = a + b: End SubB、Sub plus(ByVal sum , a , b ): sum = a + b: End SubC、Sub plus(sum , ByVal a, ByVal b ): sum = a + b: End SubD、Sub plus(sum , ByRef a , ByRef b ): sum = a + b: End Sub
以下程序用于求S=1+3+32+33+…+310的值。Private Sub Commandl_Click()S=1T=1ForI=1 To 10T=______S=S+TNextIPrint"S=";SEnd Sub
在窗体中添加一个名称为Command1的命令按钮,然后编写如下程序: Public x As Integer Private Sub Command1_Click() x=10 Call s1 Call s2 MSgBox x End Sub Private Sub s1() x=x+20 End Sub Private Sub s2() Dim x As Integer x=X+20 End Sub 窗体打开运行后,单击命令按钮,则消息框的输出结果为______。A.10B.30C.40D.50
有如下程序: Private Sub Command1_Click() as="A WORKER IS HERE" x = Len(a$) For i=1 To x - 1 b$ =Mid$(a$, i,3) If b$ ="WOR" Then S=S+ 1 Next Print S End Sub 单击命令按钮,程序运行结果为A.1B.2C.3D.5
编写如下事件过程: Private sub sub1 (ByVal x1 As String, y1 As String) Dim xt As String Dim i As Integer i = Len(x1) Do While i>= 1 xt = xt + Mid(x1, i, 1) i=i-1 Loop y1 = xt End Sub Private Sub Form. Click() Dim s1 As String, s2 As String s1= "teacher" sub1 s1, s2 Print s2 End Sub 程序运行后,单击窗体,则窗体上显示的内容是A.rehcaetB.tahreeeC.themeeD.eerthea
写出程序运行的结果Public class BasePublic virtual string Hello() {return “Base”;}Public class Sub:BasePublic override string Hello() {return “Sub”;}1. Base b = new Base(); b.Hello;2. Sub s = new Sub(); s.Hello;3. Base b = new Sub (); b.Hello;4. Sub s = new Base(); s.Hello;
下面程序的输出结果是。 Private Sub Commandl_Click ch$=“ABCDEF” proc ch:Print ch End Sub Private Sub proc(ch As Stnng) s=“” For k=Len(ch) TO 1 Step -1 s=sMid(ch,k,1) Next k ch=s End Sub A.ABCDEF B.FEDCBA C.A D.F
下列程序运行后的输出结果是______。Private Sub f(k,s) s = 1 for j = 1 To k s=s*j Next jEnd SubPrivate Sub Command1_ Click () Sum = 0 for i = 1 To 3 Call f(i, s) Sum = Sum + s Next i Print Sum End SubA.0B.3C.6D.9
在窗体中添加一个名称为Commandl的命令按钮,然后编写如下程序: Public x As Integer Private Sub Commandl_click() x=10 Call s 1 Call s 2 MsgBOx x End Sub Pfivate Sub s1() x=x+20 End Sub Private SubA.10B.30C.40D.50
编写如下事件过程: Option Base 1 Private Sub Form Click() Dim x1()As Integer Dim i As Integer Dim s As Integer ReDim x1(3) For i = 1 To UBound(x1) x1(i)=i + 1 Next i Call sub1(x1) For i = 1 To UBound(x1) s = s + x1(i) Next i Print s End Sub Private Sub sub1(n()As Integer) Dim i As Integer ReDim Preserve n(5) For i = 3 To 5 n(i)=n(i-1)*2 Next i End Sub 程序运行后,单击窗体,则窗体上显示的内容是A.6B.12C.24D.47
在窗体上画一个命令按钮,然后编写如下事件过程: Private Sub Command_Click( ) S=0 Do s=(s + 1) * (s +2) Number=Number+1 Loop Until S>=30 Print Number,S End Sub 程序运行后,输出的结果是A.2 3B.3 182C.5 12D.10 20
下列程序运行后的输出结果是______。Private Sub f(k,s)s=1For j=1 To ks=s*jNextEnd SubPrivate Sub Command1_Click()Sum=0For i=1 To 3Call f(i,s)Sum=Sum+sNextPrint SumEnd Sub
反应 CaCO3(s) → CaO(s) + CO2(g)已知: CaCO3(s) CaO(s) CO2(g) △Gθ(KJ/mol) -1128.0 -604.2 -394.4 △fHθ(KJ/mol) -1206.9 -635.1 -393.5 Sθ(J/mol/K) 92.9 39.7 213.6上述反应发生的最低温度应为多少?
反应 CaCO3(s) → CaO(s) + CO2(g)已知: CaCO3(s) CaO(s) CO2(g) △Gθ(KJ/mol) -1128.0 -604.2 -394.4 △fHθ(KJ/mol) -1206.9 -635.1 -393.5 Sθ(J/mol/K) 92.9 39.7 213.6计算298K,1atm下的△rGθ,说明在此条件下该反应能否自发进行?
填空题设字符串S1= “ABCDEF”,S2= “PQRS”,则运算S=CONCAT(SUB(S1,2,LEN(S2)),SUB(S1,LEN(S2),2))后的串值为()。