
考考你:第33章 化學反應中的能量變化
Authored by Chemistry Aristo
Chemistry
9th - 12th Grade

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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪些反應的焓變幾乎相等於它的內能變化?
(1) 2Al(s) + 3FeSO₄(aq) → Al₂(SO₄)₃(aq) + 3Fe(s)
(2) 2H₂O₂(aq) → 2H₂O(l) + O₂(g)
(3) N₂(g) + O₂(g) → 2NO(g)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮以下反應:
2C₈H₁₈(l) + 25O₂(g) → 16CO₂(g) + 18H₂O(l)
下列哪些有關這反應的陳述正確?
(1) 體系從環境吸收熱。
(2) 反應物的總焓較生成物的總焓大。
(3) 它的焓變小於零。
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪些反應是放熱的?
(1) Fe(s) + Cu²⁺(aq) → Fe²⁺(aq) + Cu(s)
(2) 2NH₃(aq) + H₂SO₄(aq) → (NH₄)₂SO₄(aq)
(3) 2Na(s) + 2H₂O(l) → 2NaOH(aq) + H₂(g)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮在恆壓下發生的以下反應:
2KHCO₃(s) → K₂CO₃(s) + CO₂(g) + H₂O(l)
下列哪項或哪些有關這反應的陳述不正確?
(1) 它是吸熱反應。
(2) 它沒有對大氣壓強作功。
(3) 反應混合物的温度下降。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮以下反應:
C₇H₁₆(l) → 3C₂H₄(g) + CH₄(g)
哪個是這反應的正確焓級圖?
A
B
C
D
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項或哪些有關吸熱反應的陳述正確?
(1) 反應的焓變是正值。
(2) 斷裂化學鍵過程所吸收的能量少於形成化學鍵過程所釋出的能量。
(3) 碳酸鎂的熱分解屬吸熱反應。
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮乙烯的完全燃燒:
C₂H₄(g) + 3O₂(g) → 2CO₂(g) + 2H₂O(l)
參照圖中的化學鍵的鍵焓數據,這反應的焓變是多少?
B. −8576 kJ mol⁻¹
D. −1072 kJ mol⁻¹
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