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Citrus2011 [14]
2 years ago
6

Why does an evaporating liquid cool down, according to the Kinetic Molecular Theory? a.Heat is required to evaporate a liquid.

Chemistry
2 answers:
kifflom [539]2 years ago
7 0

<em>Answer:</em>

  • The highest velocity molecules are lost.

<em>Explanation:</em>

  • When liquid gets energy, its molecule kinetic energy increases. So molecules move so fastly, as result few highest velocity molecules breaks the forces and evaporates. Due to this removal, overall energy of the system become less which causes the liquid to be cool.
Zinaida [17]2 years ago
3 0

Answer:

The highest velocity molecules are lost.

Explanation:

When liquid gets energy, its molecule kinetic energy increases. So molecules move so fastly, as result few highest velocity molecules breaks the forces and evaporates. Due to this removal, overall energy of the system become less which causes the liquid to be cool.

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How many grams of Mg(ClO3)2 are needed to make 1,500 mL of a 2.5 N solution ?​
yarga [219]

Answer:

33

Explanation:

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2 years ago
8. which change in state is associated with the heat of vaporization,
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The answer is 2, liquid to vapor because vaporization is the process of liquids to vapors.
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3 years ago
Which of the following pairs of reactants is not correctly listed with its product solution? A. Strong base-strong acid reactant
alexandr1967 [171]

Answer: Option B

Explanation: when strong acid react with strong base, the resulting solution is neutral as in the case of HCl and NaOH

HCl + NaOH —> NaCl + H2O

From the equation obtained, The salt ( NaCl) obtained is a normal salt which is neutral.

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Which would be a better base to use if you wanted to remove a proton from ethyne?
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2 years ago
Toluene, C7H8, is used in the manufacture of explosives such as TNT (trinitrotoluene). A 1.500 g sample of liquid toluene was pl
dusya [7]

Answer:

There were 63.67 kJ liberated

If 1 mol of toluene was burned, there would be liberated 3906 kJ / mole

Explanation:

Step 1: Data given

Mass of the toluene sample = 1.500 grams

The temperature of the calorimeter rose from 25.000 °C to 26.413 °C

<em>Write the balanced chemical equation for the reaction in the calorimeter.</em>

C7H8(l)  +  9O2(g) ⇒  7CO2(g) + 4H2O(l)

<u>Step 2:</u> Calculate Q of the calorimeter

Q = C * Δt

Q = 45.06 kJ/ °C * ( 26.413 - 25)

Q =<u> 63.67 kJ </u>

<u>Step 3:</u> Calculate moles of toluene

Moles toluene = mass toluene / molar mass toluene

Moles toluene = 1.500 grams /92.14 g/mol

Moles toluene = 0.0163 moles

<u>Step 4:</u>  Calculate energy per mole

energy per mole = 63.67 kJ / 0.0163 moles = 3906 kJ / mole

6 0
3 years ago
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