The heat of vaporization AH of ethanol (CH CH,OH) is 38.6 kJ/mol. Calculate the change in entropy AS when 4.3 g of ethanol boils at 78.4 °C.Be sure your answer contains a unit symbol. Round your answer to 2 significant digits.x10?ExplanationCheckTerms of2019 McGraw-Hill Education. All Rights Reserved.LenovoEscIXHomeInsertEndFnLockF2F3F1F4F5F6F8F7F9F10F11F12$$&13267+ IILOX

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Asked Nov 12, 2019
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Calculate the change in entropy delta S when 4.3 g of ethanol boils at 78.4 C. 2 sig figs

The heat of vaporization AH of ethanol (CH CH,OH) is 38.6 kJ/mol. Calculate the change in entropy AS when 4.3 g of ethanol boils at 78.4 °C.
Be sure your answer contains a unit symbol. Round your answer to 2 significant digits.
x10
?
Explanation
Check
Terms of
2019 McGraw-Hill Education. All Rights Reserved.
Lenovo
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FnLock
F2
F3
F1
F4
F5
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$$
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1
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2
6
7
+ II
LO
X
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The heat of vaporization AH of ethanol (CH CH,OH) is 38.6 kJ/mol. Calculate the change in entropy AS when 4.3 g of ethanol boils at 78.4 °C. Be sure your answer contains a unit symbol. Round your answer to 2 significant digits. x10 ? Explanation Check Terms of 2019 McGraw-Hill Education. All Rights Reserved. Lenovo Esc I X Home Insert End FnLock F2 F3 F1 F4 F5 F6 F8 F7 F9 F10 F11 F12 $$ & 1 3 2 6 7 + II LO X

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Expert Answer

Step 1

Given that,

Heat of vaporization of ethanol= 38.6KJ/mole

Mass of ethanol is 4.3 g

Step 2

Now you calculate the no.of moles of ethanol

given mass
Number of moles=.
Molar mass
4.3g
46.0g
0.00933 mole
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given mass Number of moles=. Molar mass 4.3g 46.0g 0.00933 mole

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Step 3

Now calculate the enthalpy of vapo...

Enthalpy of vaporization,AHno.of molexgiven enthalpy of vaporization
vap
KJ
0.00933 molex38.6
mole
-0.36014 KJ
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Enthalpy of vaporization,AHno.of molexgiven enthalpy of vaporization vap KJ 0.00933 molex38.6 mole -0.36014 KJ

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