Chemistry, 30.03.2020 23:33 mathman783
A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at 75.0°C if Ea = 91.0 kJ/mol? A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at 75.0°C if Ea = 91.0 kJ/mol? 4.10 × 106 s-1 713 s-1 1.36 × 102 s-1 2.65 × 104 s-1 3.69 × 104 s-1
Answers: 2
![\frac{k(75.0^0C)}{k(25.0^0C)} =exp[-\frac{\Delta Ea}{R}(\frac{1}{T_{k(75.0^0C)}}-\frac{1}{T_{k(25.0^0C)}} )]](/tpl/images/0571/8653/57013.png)
![k(75.0^0C)=k(25.0^0C)exp[-\frac{\Delta Ea}{R}(\frac{1}{T_{k(75.0^0C)}}-\frac{1}{T_{k(25.0^0C)}} )]\\\\k(75.0^0C)=1.35x10^2s^{-1}exp[-\frac{91000J/mol}{8.314J/(mol*K)}(\frac{1}{348.15K}-\frac{1}{298.15K} )]\\\\k(75.0^0C)=2.65 x 10^4 s^{-1}](/tpl/images/0571/8653/debb3.png)
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A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magni...
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