yzafer3971
07.05.2021 •
Chemistry
How many kJ of heat energy would be absorbed when 175.0g of ethanol, C2H5OH,
vaporizes at its boiling point, given the enthalpy of vaporization of ethanol is 39.3
kJ/mol?
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Ответ:
We want the enthalpy associated with the reaction
Explanation:
H
3
CCH
2
OH
(
l
)
+
Δ
→
H
3
CCH
2
OH
(
g
)
You have a mass of
50.0
⋅
g
EtOH
, that is assumed to be at
78.3
∘
C
, and the enthalpy of vaporization is calculated by the product:
Δ
H
∘
vaporization
=
50.0
⋅
g
46.07
⋅
g
⋅
m
o
l
−
1
×
38.6
⋅
k
J
⋅
m
o
l
−
1
=
Explanation:
Ответ: