化学问题》刚打开汽水瓶盖时,为什么汽水会涌出瓶盖

2025-03-16 05:52:47
推荐回答(5个)
回答1:

因为汽水里面有碳酸,当打开汽水瓶盖时,压强降低,碳酸分解成水和二氧化碳,而二氧化碳要跑出瓶子去,就产生了气泡

回答2:

压缩在汽水中的CO2气体挥发造成汽水溢出

回答3:

【原因】:压强减小,二氧化碳(气体)溶解度降低。

【分析】:气体的溶解度受温度和压强的影响,温度越高,气体溶解度越少,压强越少,气体溶解度越少;打开汽水瓶盖,瓶内压强减少,二氧化碳在水中的溶解度减少,汽水就会自动喷出。

【相关知识】:
空气的成分:
氧气,二氧化碳,氢气,氮气,稀有气体;按体积分:N2占78%,O2占21%,稀有气体占0.94%,二氧化碳占0.03%,其他气体和杂质占0.03%。

回答4:

因为汽水在生产的时候是要加压灌装的,在打开瓶盖的时候,瓶内压力大于瓶外,于是气体最先产生向外膨胀的趋势,继而带动液体向外涌出

回答5:

可乐出厂是密封的,打开后压强变化导致CO2冒出,带动水``

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