
課題八 化學反應與能量
Quiz
•
Chemistry
•
7th - 9th Grade
•
Practice Problem
•
Hard
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20 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項正確顯示碘的標準態?
A. I(s)
B. I2(s)
C. I2(l)
D. I2(g)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪個過程是吸熱的?
A. 炭的燃燒
B. 利用熟石灰降低土壤的pH值
C. 把辛烷在無氧的環境下加熱以生成丙烷
D. 把氯化鈣與硫酸鈉混合以生成硫酸鈣
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪個反應有對體系作功?
A. 2O3(g) → 3O2(g)
B. H2(g) + O2(g) → H2O2(l)
C. H2(g) + Br2(l) → 2HBr(g)
D. Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g)
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
下列哪項有關圖中反應的陳述不正確?
A. 反應混合物的温度上升。
B. 反應向四周釋出熱能。
C. 生成物的總焓少於反應物的總焓。
D. 形成鍵合時釋出的能量少於斷裂鍵合時所需的能量。
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
某反應的內能變化和對外界作的功分別為–256 kJ和+35 kJ。在固定壓強下,該反應的熱能變化是多少?
A. –221 kJ
B. +221 kJ
C. –291 kJ
D. +291 kJ
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
假設下列各個過程中的CCl4質量相同,哪個過程吸收的熱能最多?
A. CCl4(g) → CCl4(l)
B. CCl4(l) → CCl4(g)
C. CCl4(g) → CCl4(s)
D.CCl4(s) → CCl4(g)
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
沸騰1 mol液態BrF3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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