10分鐘小測:第34章 標準反應焓變
Quiz
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪些是量度焓變的標準條件?
(1) 温度為298 K
(2) 壓強為1 atm
(3) 使用一摩爾的各反應物
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮圖中所示的熱化學方程式。下列哪些陳述正確?
(1) 反應是放熱的。
(2) 方程式表示硝酸的標準生成焓變。
(3) 反應:2HNO₃(l) → N₂O₅(g) + H₂O(l)的標準焓變是+77.0 kJ mol⁻¹。
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪條方程式表示溴化鈣的標準生成焓變?
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
石墨和金剛石的標準生成焓變分別是0 kJ mol⁻¹和+1.9 kJ mol⁻¹。下列哪項或哪些陳述正確?
(1) 在能量上,石墨較金剛石穩定。
(2) 石墨的熱含量較金剛石的高。
(3) 石墨中的C−C鍵較金剛石中的弱。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項是碘的標準態?
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項表示式顯示乙醇完全燃燒並釋出209.6 kJ的熱時,所需乙醇的質量(以g為單位)?
A. 209.6/(1367 × 60.0)
B. 1367/(209.6 × 60.0)
C. (209.6 × 60.0)/1367
D. (1367 × 60.0)/209.6
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
在一實驗中,50 cm³的1.0 M CH₃COOH(aq)與50 cm³的1.0 M NaOH(aq)在一簡單量熱器內混合,反應混合物的最大温度升幅是4.6°C。CH₃COOH(aq)與NaOH(aq)的中和焓變是多少?
(假設反應混合物和水有相同的比熱容和密度,即分別是4.2 J g⁻¹ K⁻¹和1.0 g cm⁻³。)
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