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The heat brings about a chemical reaction, and oxygen is liberated.
热量引起化学反应，释放出氧气。
youdao
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In case the reaction is an exothermic change, you should remove the heat liberated.
假如该反应是放热变化，就应移走所放出的热。
youdao
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In case the reaction is an exothermic change, you should remove the heat liberated.
假如该反应是放热变化，就应移走所放出的热。
youdao