一定温度、压力下,化学反应Ag(s)+1/2O2(g)=Ag2O(s)可能自动发生的条件是()A、ΔS0B、反应体系的压力熵QPKθPC、ΣνBμB0D、ΔrGθm0

一定温度、压力下,化学反应Ag(s)+1/2O2(g)=Ag2O(s)可能自动发生的条件是()

  • A、ΔS>0
  • B、反应体系的压力熵QP>KθP
  • C、ΣνBμB<0
  • D、ΔrGθm<0

相关考题:

可以直接用来求Ag2SO4,的溶度积的电池是() (A)Pt|H2(p)|H2SO4(a)|AgSO4(s)|Ag;(B)AglAgNO3(a)||K2SO4(a)|PbSO4(s),Pb(s);(C)Ag(s),Ag2SO4(s)|K2SO4(a)||HCI(a)|AgCl(s),Ag(s);(D)Ag|AgNO3(a)||H2SO4(a)|Ag2SO4(s),Ag(s)

下面运行程序后,单击命令按钮,输出的结果是______。Private Sub Commandl_clck()Dim a%(1 To 4),b%(3 To 6),i%,s1,s2Fori=1 To 4a(i)=iNextiFor i=3 To 6b(i)=iNextis1=YAS(a)S2=YAS(b)Printt"s1=";S1"S2=";s2End Sub

在窗体上画一个命令按钮和两上文体,其名称分别为 Command1 、 Text1 和 Text2 ,然后编写如下程序:Dim S1 As String, S2 As StringPrivate Sub Form_Load()Text1. Text=””Text2. Text=””End SubPrivate Sub Text1_KeyDown(KeyCode As Integer, Shift As Integer)S2=s2 Chr(KeyCode)End SubPrivate Sub Text1_KeyPress(KeyAscii As Integer)S1=S1 chr(KeyAscii)End SubPrivate Sub Command1_Click()Text1.Text=S2Text2.Text=S1S1=""S2=""End Sub程序运行后,在Text1中输入"abc",然后单击命令按钮,在文本框 Text1 和 Text2 中显示的内容分别为( )。A.abc 和 ABCB.abc 和 abcC.ABC 和 abcD.ABC 和 ABC

在窗体上画一个命令按钮和两个文本框,其名称分别为Command1、Text1和Text2,然后编写如下程序: Dim S1 As String,S2 As String Private Sub Form_Load() Text1.Text="" Text2.Text="" End Sub Private Sub Text1_KeyDown(KeyCode As Integer,Shift As Integer) S2=S2 Chr(Keycode) End Sub Private Sub Text1_KeyPress(KeyAscii As Integer) S1=S1 Chr(KeyAscii) End Sub Private Sub Command1_Click() Text1.Text=S2 Text2.Text=S1 S1="" S2="" End Sub 程序运行后,在Text1中输入“abc”,然后单击命令按钮,在文本框Text1和Text2中显示的内容分别为______。A.abc和ABCB.abc和abeC.ABC和abcD.ABC和ABC

可以直接用来求Ag2SO4的溶度积的电池是A、Pt|H2(p)|H2SO4(a)|Ag2SO4(s)|AgB、Ag|AgNO3(a)||K2SO4(a)|PbSO4(s),Pb(s)C、Ag(s),Ag2SO4(s)|K2SO4(a)||HCl(a)|AgCl(s),Ag(s)D、Ag|AgNO3(a)||H2SO4(a)|Ag2SO4(s),Ag(s)

在298K时,下列反应的ΔrHθm等于AgBr(s)的ΔrHθm的为()。 A、Ag+(aq)+Br-(aq)=AgBr(s)B、2Ag(s)+Br2(l)=2AgBr(s)C、Ag(s)+1/2Br-(g)=AgBr(s)D、Ag(s)+1/2Br2(l)=AgBr(s)

设字符串s1='ABCDEFG',s2='PQRST',则运算s=CONCAT(SUB(s1,2,LEN(s2)),SUB(s1,LEN(s2,2))后的串值为(65)。A.'ABCDEFEF'B.'BCDEFG'C.'BCPQRST'D.'BCQR'

有如下程序 Private Sub Command1_Chck( ) s=0 DO s=(s+1) *(s+2) N=N+1 Loop Until s>=10 Prim N;s End Sub 运行后的输出结果是A.0 1B.30 30C.4 30D.2 12

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

在窗体上画一个命令按钮和两个文本框,其名称分别为Command1、Text1和Text2,在属性窗口中把窗体的KeyPreview属性设置为True,然后编写如下程序: Diln S1 As String,S2 As String Private Sub Form. Load( ) Text1.Text="" Text2.Text="" Text1.Enabled=False Text2.Enabled=False End Sub Private Sub Form. KeyDown(KeyCode As Integer,Shift As Integer) S2=S2&Chr(KeyCode) End Sub Pri vate Sub Form. KeyPress(KeyAscii As Integer) S1=S1&Chr(KeyAscii) End Sub Private Sub Command1 Click( ) Text1.Text=S1 Text2.Text=S2 S1="" S2="" End Sub 程序运行后,先后按“a”、“b”、“c”键,然后单击命令按钮,在文本框Text1和Text2中显示的内容分别为( )。A.abc和ABCB.空白C.ABC和abcD.出错

运行下列程序:Private Sub Command1_Click( )Dim s1 As String * 1Dim s2 As Strings1 = aFor i = Asc(s1) To Asc(s1) + 4s2 = s2 Chr(i)Next iPrint s2End Sub单击Command1命令按钮后,则在窗体上显示的结果是( )。A.aB.abcdeC.aaaaD.s2

下列程序的执行结果为 Private Sub Command1_Click() Dim s1 As String,s2 As String S1;="abcdef" Call Invert(s1,s2) Print s2 End Sub Private Sub Invert (ByVal xstr As String,ystr As String) Dim tempstr As String i=Len(xstr) Do While i=1 tempstr=tempstr+Mid(xstr,i,1) i=i-1 Loop ystr=tempstr End SubA.fedcbaB.abcdefC.afbecdD.defabc

下列程序的执行结果为 Private Sub Commandl_Click() Dim s1 As String ,s2 As String s1= "abcd" Call Transfer(sl,s2) Print s2 End Sub Private Sub Transfer (ByVal xstr As String,ystr As String) Dim tempstr As String ystr=tempstr End SubA.dcbaB.abdcC.abcdD.dabc

已知MNO(s)══MNO(s)+1/2O(g)△══134.8kJ/molMNO(s)+M(s)+1/2N(g)══2MNO(s)△══-250.1kJ/mol,则MNO(s)的△f为A.115.3kJ/molB.-115.3kJ/molC.-519.7kJ/molD.519.7kJ/mol

下列反应中哪个是表示△H=△H(AgBr,s)的反应()A、Ag(aq)+Br(aq)AgBr(s)B、2Ag(s)+Br2(g)2AgBr(s)C、Ag(s)+Br2(l)AgBr(s)D、Ag(s)+Br2(g)AgBr(s)

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()。

下列反应中哪个是表示ΔfHθm (AgI,s)的反应式()A、Ag+(aq)+I-(aq)= AgI(s)B、2Ag(s)+ I2(s)=2AgI(s)C、2Ag(s)+ I2(g)=2AgI(s)D、Ag(s)+ 1/2I2(s)=AgI(s)

下列反应中ΔrGmΘ等于产物ΔfGmΘ的是哪个?()A、Ag+(aq)+Cl-(aq)→AgCl(s)B、2Ag(s)+Cl2(g)→2AgCl(s)C、Ag(s)+1/2Cl2(g)→AgCl(s)D、Ag(s)+1/2Cl2(l)→AgCl(s)

同一温度和压力下,一定量某物质的熵值是()。A、S(气)<S(液)<S(固)B、S(气)>S(液)>S(固)C、S(液)>S(气)>S(固)D、S(液)>S(固)>S(气)

Ag2O分解可用下列两个反应方程之一表示,其相应的平衡常数也一并列出  I.  Ag2O(s) === 2Ag(s) + (1/2)O2(g)  Kp(Ⅰ)  II. 2Ag2O(s) === 4Ag(s) + O2(g)     Kp(Ⅱ)   设气相为理想气体,而且已知反应是吸热的,试问下列结论是正确的是:()A、Kp(Ⅱ)= Kp(Ⅱ)B、Kp(Ⅰ)= Kp2(Ⅱ)C、O2气的平衡压力与计量方程的写法无关D、Kp(Ⅰ)随温度降低而减小

Ag2CrO4与AgSCN的溶度积常数几乎相同,比较溶解度S,正确的为()。A、S(AgSCN)=S(Ag2CrO4)B、S(AgSCN)>(Ag2CrO4)C、S(AgSCN)<S(Ag2CrO4)D、2S(AgSCN)=S(Ag2CrO4)

一定温度下,(1)Km; (2)(aG/aξ)T,p; (3)ΔrGθ; (4)Kf四个量中, 不随化学反应体系压力及组成而改变的量是:()A、1,3B、3,4C、2,4D、2,3

化学反应Ag(s)+1/2O2(g)=Ag2O(s)的平衡体系中,可能平衡共存的相数最多有()A、2相B、3相C、4相D、5相

CaCO3(s)在高温下分解为CaO(s)和CO2(g),根据相律解释下列实验事实: (1)在一定压力的CO2(g)中,将CaCO3(s)加热,实验证明在加热过程中,在一定的温度范围内CaCO3(s)不会分解。 (2)在CaCO3(s)的分解过程中,若保持CO2的压力恒定,实验证明达分解平衡时,温度有定值。

445℃时,Ag2O(s)分解压力为20974kPa,该分解反应Ag2O(s) = 2Ag(s)+½O2(g)的ΔrGmθ=()

已知 445℃时,Ag2O(s)的分解压力为20 974kPa,则此时分解反应 Ag2O(s)=2Ag(s)+(1/2)O2(g)的ΔrGmθ为:()A、14.387J/molB、15.92kJ/molC、-15.92kJ/molD、-31.83kJ/mol

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()。