测量值8.342g,真值8.340g,测量相对误差()A.2%B.2.3%C.0.024%D.0.24%A.2%            B.2.3%          C.0.24%            D.0.24%

标准摩尔熵Smθ的大小顺序是（ ）。A. Cl2O (g) &#91; Br2 (g) < Cl2 (g) < F2 (g) <H2(g) ; B. Br2 (g) &#93; Cl2O (g) > Cl2 (g) > F2 (g) > H2 (g) ;C. H2 (g) < F2 (g) < Cl2 (g) < Br2 (g) < Cl2O (g) ; D. Br2 (g) < Cl2O (g ) < Cl2 (g) < F2 (g) < H2 (g) A: Cl2O (g) < Br2 (g) < Cl2 (g) < F2 (g) <H2(g) ; B: Br2 (g) > Cl2O (g) > Cl2 (g) > F2 (g) > H2 (g) ; C: H2 (g) < F2 (g) < Cl2 (g) < Br2 (g) < Cl2O (g) ; D: Br2 (g) < Cl2O (g ) < Cl2 (g) < F2 (g) < H2 (g)

【单选题】同一土样的饱和重度 g sat 、干重度 g d 、天然重度 g 、有效重度 g ′大小存在的关系是: A. g sat > g d > g > g ′ B. g sat > g > g d > g ′ C. g sat > g > g ′ > g d D. g sat > g ′> g > g d

下列物质标准熵的大小排列顺序正确的是：（ ）。 A: Br2(g)＞Cl2O(g)＞Cl2(g)＞F2(g)＞H2(g) B: Cl2O(g)＞Br2(g)＞Cl2(g)＞F2(g)＞H2(g) C: Br2(g)＜Cl2O(g)＜Cl2(g)＜F2(g)＜H2(g) D: Cl2O(g)＜Br2(g)＜Cl2(g)＜F2(g)＜H2(g)

下列各组物质的标准摩尔熵大小顺序正确的是 。‌ A: C12O(g)<Br2(g)<Cl2(g)<F2(g)<H2(g) B: Br2(g)>C12O(g)>C12(g)>F2(g)>H2(g) C: H2(g)<F2(g)<Cl2(g)<Br2(g)<Cl2O(g) D: Br2(g)<Cl2O(g)<Cl2(g)<F2(g)<H2(g)

下列物质标准熵[img=39x21]1803d7dfd9209b0.png[/img]的大小排列顺序正确的是（ ） A: Cl2O(g) Br2(g) Cl2(g) F2(g) H2(g) B: Br2(g)Cl2O(g) Cl2(g) F2(g) H2(g) C: Cl2O(g) Br2(g) Cl2(g) F2(g) H2(g) D: Br2(g)Cl2O(g) Cl2(g) F2(g) H2(g)

下列物质的标准摩尔熵Sm的大小顺序是() A: Cl2O (g) 2(g) 2(g) 2(g) 2(g) ; B: Br2(g) &gt; Cl2O (g) &gt; Cl2(g) &gt; F2(g) &gt; H2(g) ; C: H2(g) 2(g) 2(g) 2(g) 2O (g) ; D: Br2(g) 2O (g ) 2(g) 2(g) 2(g)

合成氨中变换反应的主反应是什么？ A: CO(g) + 2H2 (g) = CH3OH (g) B: CO(g) + H2O(g) = CO2(g) + H2(g) C: CH4 (g) + H2O(g) = CO(g) + 3H2(g) D: N2(g) + 3H2 (g) = 2NH3 (g)

已知298K时：N2(g)+O2(g)=2NO(g) Kθ1 N2(g)+3H2(g)=2NH3(g) Kθ22H2(g)+O2(g)=2H2O(g) Kθ3则4NH3(g)+5O2(g)=4NO(g)+6H2O(g)的Kθ= 。

已知：2H2(g)+S2(g)=2H2S(g)            Kp1 2Br2(g)+2H2S(g)=4HBr(g)+S2(g)    Kp2 H2(g)+Br2(g)=2HBr(g)             Kp3 则Kp3等于( )