某实验记录了不同温度下某化学反应的速率常数 k,数据如下:温度 T(°C): 10, 20, 30, 40;速率常数 k(s⁻¹): 0.01, 0.02, 0.04, 0.08。根据这些数据,下列推断最合理的是:
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Correct answer
B. 速率常数随温度升高而增大,且每升高10°C约翻倍
Principle or equation
根据数据,温度每升高10°C,速率常数近似变为原来的2倍,符合阿伦尼乌斯方程中速率常数随温度升高而增大的趋势。
Why this answer is correct
从10°C到20°C,k从0.01变为0.02,翻倍;20°C到30°C,0.02变为0.04,翻倍;30°C到40°C,0.04变为0.08,翻倍。因此最合理的是速率常数随温度升高而增大,且每升高10°C约翻倍。
Example
若温度从40°C升高到50°C,可推测k约为0.16 s⁻¹。
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