
考考你:第34章 標準反應焓變
Quiz
•
Chemistry
•
9th - 12th Grade
•
Practice Problem
•
Hard
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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
考慮以下反應:
2CH₃CH₂OH(l) + 6O₂(g) → 4CO₂(g) + 6H₂O(l) ΔH = −2733.6 kJ mol⁻¹
圖中反應的ΔH值是多少?
B. −683.4 kJ mol⁻¹
D. −10934.4 kJ mol⁻¹
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
已知在298 K和1 atm下,把44.0 g的丙烷在氧中完全燃燒並生成二氧化碳和水時,釋出2219.2 kJ的熱,下列哪些有關丙烷的標準燃燒焓變的陳述正確?
(1) 它是指在標準條件下,把一摩爾丙烷在氧中完全燃燒時的焓變。
(2) 它是一個負值。
(3) 反應的熱化學方程式是C₃H₈(g) + 5O₂(g) → 3CO₂(g) + 4H₂O(g)。
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
指示:第3和4題是關於使用圖中所示的實驗裝置來測定甲醇的燃燒焓變。
在實驗條件下甲醇的燃燒焓變是多少?
(相對原子質量:H = 1.0、C = 12.0、O = 16.0;水的比熱容 = 4.2 J g⁻¹ K⁻¹)
B. −537 600 kJ mol⁻¹
D. −537.6 kJ mol⁻¹
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
指示:第3和4題是關於使用圖中所示的實驗裝置來測定甲醇的燃燒焓變。
這實驗的誤差來源是甚麼?
(1) 有熱向環境散失。
(2) 甲醇發生不完全燃燒。
(3) 金屬罐吸收了熱。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
當20 cm³的1.0 M HCl(aq)與20 cm³的1.0 M NaOH(aq)反應,温度變化是ΔT。若改以5 cm³的1.0 M HCl(aq)與5 cm³的1.0 M NaOH(aq)來重複這反應,温度變化會是
A. (1/4)ΔT。
B. 4ΔT。
C. ΔT。
D. (ΔT)⁴。
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪條或哪些方程式正確表示在標準條件下,一摩爾物質從它的組成元素的生成?
(1) 6C(金剛石) + 6H₂(g) + 3O₂(g) → C₆H₁₂O₆(s)
(2) 2Na(s) + S(s) + 2O₂(g) → Na₂SO₄(s)
(3) H₂(g) + Cl₂(g) → 2HCl(g)
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