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2 years ago

Which of the following best explains what happens when the kinetic energy of particles in a liquid state decreases?

2 answers:

7 0

I think the correct answer from the choices listed above is option C. When the kinetic energy of particles in a liquid state decreases, the molecules move more slowly, resulting in the formation of a solid. Hope this answers the question. Have a nice day.

TEA [102]2 years ago

5 0

I believe the correct response is C.

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How many atoms are in 12 moles of silver?

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Answer:

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Explanation:

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3 years ago

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MA_775_DIABLO [31]

Answer:

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Explanation:

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3 years ago

Using the equations 2 Sr(s) + O₂ (g) → 2 SrO (s) ∆H° = -1184 kJ/mol SrO (s) + CO₂ (g) → SrCO₃ (s) ∆H° = -234 kJ/mol CO₂ (g) → C(

kkurt [141]

Answer: The $\Delta H^o_{rxn}$ for the reaction is 72 kJ.

Explanation:

Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.

According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.

The given chemical reaction follows:

$2SrCO_3(s)\rightarrow 2Sr(s)+2C(s)+3O_2(g)$ $\Delta H^o_{rxn}=?$

The intermediate balanced chemical reaction are:

(1) $2Sr(s)+O_2(g)\rightarrow 2SrO(s)$ $\Delta H_1=-1184kJ$

(2) $SrO(s)+CO_2(g)\rightarrow SrCO_3(s)$ $\Delta H_2=-234kJ$ ( × 2)

(3) $CO_2(g)\rightarrow C(s)+O_2(g)$ $\Delta H_3=394kJ$ ( × 2)

The expression for enthalpy of the reaction follows:

$\Delta H^o_{rxn}=[1\times (\Delta H_1)]+[2\times (-\Delta H_2)]+[2\times (\Delta H_3)]$

Putting values in above equation, we get:

$\Delta H^o_{rxn}=[(1\times (-1184))+(2\times -(-234))+(2\times (394))]=72kJ$

Hence, the $\Delta H^o_{rxn}$ for the reaction is 72 kJ.

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3 years ago

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docker41 [41]

Answer:

B. Solvent

Explanation:

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2 years ago

How many protons and electrons are contained in an atom of element 44?

vitfil [10]

Answer:

Explanation:

protons and electrons have the same number:)

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3 years ago

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