在标准大气压下,将一块冰置于烧杯中加热,温度从-10℃升至0℃时冰开始熔化,但温度保持0℃直至全部变为水。该过程中涉及的主要变化类型是?
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Correct answer
A. 只有物理变化
Principle or equation
物质三态变化(熔化、汽化等)过程中分子种类不变,属于物理变化。
Why this answer is correct
冰熔化为水只是分子间距离和排列方式改变,分子本身未变,无新物质生成,故为物理变化。
Example
冰→水→水蒸气,均为物理变化。
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