第 1 题
1 分Which of the following processes represents an endothermic change?
GCE O-Level · Science (Physics, Chemistry) (5086)
Chemical Energetics：练习题
5 道选择题即时批改，另有 1 道文字题附完整解题步骤，全部围绕「Chemical Energetics」。
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第 2 题
1 分When solid ammonium chloride is dissolved in water, the temperature of the solution decreases from \(24.0^{\circ}\text{C}\) to \(18.5^{\circ}\text{C}\).
Which statement correctly describes this process?
第 3 题
1 分When a piece of magnesium metal is added to dilute hydrochloric acid, hydrogen gas is evolved and the temperature of the reaction mixture rises from \(21.0^{\circ}\text{C}\) to \(34.5^{\circ}\text{C}\).
What type of reaction is this, and what is the direction of heat energy transfer?
第 4 题
1 分During a chemical reaction, the temperature of the surroundings increases. Which of the following statements about this reaction is correct?
第 5 题
1 分Which of the following chemical or physical processes is classified as exothermic?
第 6 题
2 分Which of the following processes is classified as an endothermic change?
A) Dissolving ammonium nitrate in water
B) Burning fossil fuels
C) Neutralisation of an acid by an alkali
D) Reaction of sodium with water
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