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Thepotemich [5.8K]
3 years ago
5

Is it a solid or aqueous

Chemistry
1 answer:
In-s [12.5K]3 years ago
7 0
Here Here here it’s a Solid
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A certain first-order reaction has a rate constant of 2.75 10-2 s−1 at 20.°c. what is the value of k at 45°c if ea = 75.5 kj/mol
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Answer:

0.314 s⁻¹  

Step-by-step explanation:

Use the <em>Arrhenius equation.</em>

\ln( \frac{k_2 }{k_1 }) = (\frac{E_{a} }{R })(\frac{ 1}{T_1} - \frac{1 }{T_2 })\\

Data:

k₁ = 0.0275 s⁻¹;            k₂ = ?

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<em>Calculation: </em>

\ln(\frac{k_{2} }{0.0275}) = (\frac{75 500 }{8.314})(\frac{ 1}{293.15} - \frac{1 }{318.15 })

\ln(\frac{k_{2} }{0.0275}) = 9081\times 2.681 \times10^{-4}

\ln(\frac{k_{2} }{0.0275}) = 2.434

\frac{k_{2} }{0.0275} = \text{e}^{2.434}

\frac{k_{2} }{0.0275} = 11.41

k₂ = 0.0275 × 11.41

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