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Semmy [17]
3 years ago
11

Which the following countries founded their first permanent settlement in North America: England, the Netherlands,France,and Spa

in
Chemistry
1 answer:
butalik [34]3 years ago
8 0
England with the Jamestown colony
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if you were to engineer an everyday solution for conserving water which activity do you think would be the most impactful ?
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If you were to engineer an everyday solution for conserving water which activity do you think would be the most impactful ?
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What is kind of property is denisty?
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INTENSIVE PROPERTY OF MATTER

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2 years ago
He rate constant of a reaction is 4.55 × 10−5 l/mol·s at 195°c and 8.75 × 10−3 l/mol·s at 258°c. what is the activation energy o
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Answer : The activation energy of the reaction is, 17.285\times 10^4kJ/mole

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The relation between the rate constant the activation energy is,  

\log \frac{K_2}{K_1}=\frac{Ea}{2.303\times R}\times [\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_1 = initial rate constant = 4.55\times 10^{-5}L/mole\text{ s}

K_2 = final rate constant = 8.75\times 10^{-3}L/mole\text{ s}

T_1 = initial temperature = 195^oC=273+195=468K

T_2 = final temperature = 258^oC=273+258=531K

R = gas constant = 8.314 kJ/moleK

Ea = activation energy

Now put all the given values in the above formula, we get the activation energy.

\log \frac{8.75\times 10^{-3}L/mole\text{ s}}{4.55\times 10^{-5}L/mole\text{ s}}=\frac{Ea}{2.303\times (8.314kJ/moleK)}\times [\frac{1}{468K}-\frac{1}{531K}]

Ea=17.285\times 10^4kJ/mole

Therefore, the activation energy of the reaction is, 17.285\times 10^4kJ/mole

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Explanation:

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