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Firlakuza [10]
2 years ago
13

This table has information about the heat of fusion and the heat of vaporization of different substances. A 3-column table with

10 rows. Column 1 is labeled substance. Column 2 is labeled delta H fusion in kilojoules per mole. Column 3 is labeled delta H vaporization in kilojoules per mole. Ten rows are as follows: H 2 O, 6.01, 40.7. C O 2, 7.94, 25.2. O 2, 0.443, 6.81. N 2, 0.719, 5.58. F e, 14.9, 354. A l, 10.7, 255. C u, 13.0, 304. N a C l, 30.2, 171. C H 4, 0.936, 8.53. H 2 S, 2.37, 18.7. Which substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes? Use q equals n delta H.. a.CH4 b.H2S c.CO2 d.NaCl
Chemistry
2 answers:
dmitriy555 [2]2 years ago
7 0

Answer:

b

Explanation:

blagie [28]2 years ago
3 0

H₂S

<h3>Further explanation</h3>

Given

ΔH fusion and ΔH vaporization  of different substances

Required

The substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes

Solution

We can use the formula :

\tt \Delta H=\dfrac{Q}{n}

Q=heat/energy absorbed

n = moles

The heat absorbed : 58.16 kJ

moles = 3.11

so ΔH vaporization :

\tt \Delta H_{vap}=\dfrac{58.16~kJ}{3.11~mol}\\\\\Delta H_{vap}=18.7~kJ/mol

The correct substance which has ΔH vaporization = 18.7 kj / mol is H₂S

(H₂S from the data above has ΔH fusion = 2.37 kj / mol and ΔH vaporization = 18.7 kj / mol)

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Answer: There are 145 \times 10^{23} atoms in 24 moles of Fe.

Explanation:

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Therefore, atoms present in 24 moles of Fe are calculated as follows.

24 mol \times 6.022 \times 10^{23} atoms/mol\\= 144.52 \times 10^{23} atoms\\or,  145 \times 10^{23} atoms

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What is the solution to the problem expressed to the correct number of significant figures
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Astroturf is a durable artificial surface used to cover athletic fields. A soccer field 0.06214- mile-long by 253 ft wide is cov
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