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Dahasolnce [82]
3 years ago
6

Difine an exothermic reaction

Chemistry
2 answers:
Vika [28.1K]3 years ago
4 0

Answer:

An exothermic reaction is a chemical reaction in which less energy is needed to break bonds in the reactants than is released when new bonds form in the products. During an exothermic reaction, energy is constantly given off, often in the form of heat. All combustion reactions are exothermic reactions.

Explanation:

Y_Kistochka [10]3 years ago
4 0
An exothermic reaction is a "reaction for which the overall standard enthalpy change ΔH⚬ is negative." Exothermic reactions usually release heat and entail the replacement of weak bonds with stronger ones.
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You wish to make a 0.289 M hydroiodic acid solution from a stock solution of 3.00 M hydroiodic acid. How much concentrated acid
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Answer:

V_1=9.63mL

Explanation:

Hello,

In this case, we work on a dilution process in which we can state that the moles remain the same after the dilution process. In such a way, we can write:

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That in terms of molarities and volumes is:

M_1V_1=M_2V_2

Whereas M_1 is the initial molarity (3.00 M) of the stock solution, M_2 the molarity of the diluted solution (0.289 M), V_1 the aliquot of the stock (concentrated) solution and V_2 the volume of the diluted solution (100 mL), thus, we compute V_1 as required:

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