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25分鐘測驗:課題八 化學反應與能量

Authored by Chemistry Aristo

Chemistry

9th - 12th Grade

25分鐘測驗:課題八 化學反應與能量
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20 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

哪個有關化學反應及它的焓變的組合不正確

A

B

C

D

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

已知圖中化學鍵的鍵焓數據。以下反應的焓變是多少?

H₂(g) + F₂(g) → 2HF(g)

A. –693 kJ mol⁻¹

B. +693 kJ mol⁻¹

C. –1309 kJ mol⁻¹

D. +1309 kJ mol⁻¹

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

已知圖中各熱化學方程式。CaCO₃(s)的標準生成焓變是多少?

A. +851 kJ mol⁻¹

B. –851 kJ mol⁻¹

C. +1208 kJ mol⁻¹

D. –1208 kJ mol⁻¹

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

已知圖中各數據。以下反應的標準焓變是多少?

2NaHCO₃(s) → Na₂CO₃(s) + H₂O(l) + CO₂(g)

A. +27 kJ mol⁻¹

B. –27 kJ mol⁻¹

C. +889 kJ mol⁻¹

D. –889 kJ mol⁻¹

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

一反應的內能變化和對環境作的功分別是–256 kJ和+35 kJ。在恆壓下,該反應的熱變是多少?

A. –221 kJ
B. +221 kJ
C. –291 kJ
D. +291 kJ

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

在一量熱法的實驗中,若把2.30 g的乙醇(CH₃CH₂OH)在酒精燈中燃燒,在金屬容器中的300 g水的温度便升高了35°C。在該實驗條件下,乙醇的燃燒焓變是多少?

(水的比熱容 = 4.2 J g⁻¹ K⁻¹;相對原子質量:H = 1.0、C = 12.0、O = 16.0)

A. –192 kJ mol⁻¹

B. –383 kJ mol⁻¹

C. –882 kJ mol⁻¹

D. –959 kJ mol⁻¹

7.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

已知:

Br₂(g) + 3F₂(g) → 2BrF₃(g)  ΔH = –511 kJ mol⁻¹

Br₂(g) + 3F₂(g) → 2BrF₃(I)   ΔH = –602 kJ mol⁻¹

使1摩爾的液態BrF₃沸騰的焓變是多少?

A. –45.5 kJ mol⁻¹

B. +45.5 kJ mol⁻¹

C. –91.0 kJ mol⁻¹

D. +91.0 kJ mol⁻¹

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