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3 years ago

Reactions cannot occur without a certain minimum amount of energy. what is this minimum amount of energy called?

Chemistry

2 answers:

romanna [79]3 years ago

8 0

Explanation:

The minimum amount of energy required by the species to undergo a certain reaction is known as activation energy.

Without activation energy reactions cannot occur.

Also, reactants cannot participate in a reaction unless and until they do not cross energy barrier.

Hence, to result in the formation of products it is necessary for reactants to cross the energy barrier.

Dovator [93]3 years ago

4 0

This type of energy would be called reaction energy.

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Answer:

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Explanation:

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What's the <em>theoretical</em> yield of this reaction?

In other words, what's the mass of the CO₂ that should come out of heating 40.1 grams of CaCO₃?

Molar mass of CaCO₃:

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Number of moles of CaCO₃ available:

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Mass of the 0.400655 moles of $\text{CO}_2$ expected for the 40.1 grams of CaCO₃:

$m(\text{CO}_2) = n\cdot M = 0.400655 \times 44.009 = 17.632\;\text{g}$ .

What's the <em>percentage</em> yield of this reaction?

$\displaystyle \textbf{Percentage}\text{ Yield} = \frac{\textbf{Actual}\text{ Yield}}{\textbf{Theoretical}\text{ Yield}}\times 100\%\\\phantom{\textbf{Percentage}\text{ Yield}} = \frac{13.2}{17.632}\times 100\%\\\phantom{\textbf{Percentage}\text{ Yield}} =74.9\%$ .

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