【单选题】已知: H 2 (g)+Br 2 (g)→2HBr(g) , △ r H m q (1) ; H 2 (g)+Br 2 (l)→2HBr(g) , △ r H m q (2) ; 则 △ r H m q (1) 与 △ r H m q (2) 的关系是( )。
A.
△ r H m q (1)> △ r H m q (2)
B.
△ r H m q (1)= - △ r H m q (2)
C.
△ r H m q (1)= △ r H m q (2)
D.
△ r H m q (1)< △ r H m q (2)
【单选题】已知: H 2 (g)+I 2 (g)→2HI(g) , △ r H m q (1) ; H 2 (g)+I 2 (s)→2HI(g) , △ r H m q (2) ;则 △ r H m q (1) 与 △ r H m q (2) 的关系是 ( ) 。
A.
△ r H m q (1)> △ r H m q
B.
△ r H m q (1)< △ r H m q (2)
C.
△ r H m q (1)= △ r H m q (2)
D.
△ r H m q (1)=‒ △ r H m q (2)
【单选题】已知 C 2 H 2 (g) + 5/2O 2 (g) = 2 CO 2 (g) + H 2 O( l ) Δ r H m Θ 1 C(s) + O 2 (g) = CO 2 (g) Δ r H m Θ 2 H 2 (g) + 1/2O 2 (g) = H 2 O( l ) Δ r H m Θ 3 则 Δ f H m Θ (C 2 H 2 , g) 与 Δ r H m Θ 1 、 Δ r H m ...
A.
Δ r H m Θ 1 + Δ r H m Θ 2 + Δ r H m Θ 3
B.
2 Δ r H m Θ 2 - Δ r H m Θ 3 - Δ r H m Θ 1
C.
2 Δ r H m Θ 2 + Δ r H m Θ 3 + Δ r H m Θ 1
D.
2 Δ r H m Θ 2 + Δ r H m Θ 3 - Δ r H m Θ 1
【单选题】已知: H 2 (g)+I 2 (g) → 2HI(g) , △ r H m (1) ; H 2 (g)+I 2 (s) → 2HI(g) , (2) ; 则 △ r H m (1) 与 △ r H m (2) 的关系是 . ( )
A.
△ r H m (1)> △ r H m (2)
B.
△ r H m (1)< △ r H m (2)
C.
△ r H m (1)= △ r H m (2)
D.
△ r H m (1)=- △ r H m (2)
【单选题】已知 C 2 H 2 (g)+ 5/2O 2 (g)= H 2 O(l)+ 2CO 2 (g) ⊿ r H m ɵ , 1 C(s)+ O 2 (g) = CO 2 (g) ⊿ r H m ɵ , 2 H 2 (g) + 1/2O 2 (g) = H 2 O(g) ⊿ r H m ɵ , 3 则 ⊿ f H m ɵ (C 2 H 2 , g) 与 ⊿ r H m ɵ , 1 、 ⊿ r H m ɵ...
A.
⊿ f H m ɵ (C 2 H 2 , g) = ⊿ r H m ɵ , 1 + ⊿ r H m ɵ , 2 + ⊿ r H m ɵ , 3
B.
⊿ f H m ɵ (C 2 H 2 , g) =2 ⊿ r H m ɵ , 2 - ⊿ r H m ɵ , 1 - ⊿ r H m ɵ , 3
C.
⊿ f H m ɵ (C 2 H 2 , g) =2 ⊿ r H m ɵ , 2 + ⊿ r H m ɵ , 1 + ⊿ r H m ɵ , 3
D.
⊿ f H m ɵ (C 2 H 2 , g) =2 ⊿ r H m ɵ , 2 - ⊿ r H m ɵ , 1 + ⊿ r H m ɵ , 3
【单选题】已知: H 2 (g)+I 2 (g) → 2HI(g) , △ r H m θ (1) ; H 2 (g)+I 2 (s) → 2HI(g) , △ r H m θ (2) ; 则 △ r H m θ (1) 与 △ r H m θ (2) 的关系是 ( )。
A.
△ r H m θ (1)> △ r H m θ (2)
B.
△ r H m θ ( 1)< △ r H m θ ( 2)
C.
△ r H m θ (1)= △ r H m θ (2)
D.
△ r H m θ (1)=- △ r H m θ (2)
【判断题】第二套人民币纸币有12种不同的面额。()
【简答题】He wondered whether it would be p______( 适当 )to knock at the door of her room.