Given the following data Ca ( s ) + 2 C ( g r a p h i t e ) → CaC 2 ( s ) Δ H = − 62.8 KJ Ca ( s ) + 1 2 O 2 ( g ) → CaO ( s ) Δ H = − 635.5 KJ CaO ( s ) + H 2 O ( l ) → Ca ( OH ) 2 ( a q ) Δ H = − 653.1 KJ C 2 H 2 ( g ) + 5 2 O 2 ( g ) → 2 CO 2 ( g ) + H 2 O ( l ) Δ H = − 1300. KJ C ( g r a p h i t e ) + O 2 ( g ) → CO 2 ( g ) Δ H = − 393.5 KJ Calculate ∆ H for the reaction CaC 2 ( s ) + 2 H 2 O ( l ) → Ca ( OH ) 2 ( a q ) + C 2 H 2 ( g )
Given the following data Ca ( s ) + 2 C ( g r a p h i t e ) → CaC 2 ( s ) Δ H = − 62.8 KJ Ca ( s ) + 1 2 O 2 ( g ) → CaO ( s ) Δ H = − 635.5 KJ CaO ( s ) + H 2 O ( l ) → Ca ( OH ) 2 ( a q ) Δ H = − 653.1 KJ C 2 H 2 ( g ) + 5 2 O 2 ( g ) → 2 CO 2 ( g ) + H 2 O ( l ) Δ H = − 1300. KJ C ( g r a p h i t e ) + O 2 ( g ) → CO 2 ( g ) Δ H = − 393.5 KJ Calculate ∆ H for the reaction CaC 2 ( s ) + 2 H 2 O ( l ) → Ca ( OH ) 2 ( a q ) + C 2 H 2 ( g )
Solution Summary: The author defines enthalpy change as amount of heat absorbed or released in chemical reactions at constant pressure.
Ca
(
s
)
+
2
C
(
g
r
a
p
h
i
t
e
)
→
CaC
2
(
s
)
Δ
H
=
−
62.8
KJ
Ca
(
s
)
+
1
2
O
2
(
g
)
→
CaO
(
s
)
Δ
H
=
−
635.5
KJ
CaO
(
s
)
+
H
2
O
(
l
)
→
Ca
(
OH
)
2
(
a
q
)
Δ
H
=
−
653.1
KJ
C
2
H
2
(
g
)
+
5
2
O
2
(
g
)
→
2
CO
2
(
g
)
+
H
2
O
(
l
)
Δ
H
=
−
1300.
KJ
C
(
g
r
a
p
h
i
t
e
)
+
O
2
(
g
)
→
CO
2
(
g
)
Δ
H
=
−
393.5
KJ
Calculate ∆H for the reaction
CaC
2
(
s
)
+
2
H
2
O
(
l
)
→
Ca
(
OH
)
2
(
a
q
)
+
C
2
H
2
(
g
)
Using the graphs could you help me explain the answers. I assumed that both graphs are proportional to the inverse of time, I think. Could you please help me.
Synthesis of Dibenzalacetone
[References]
Draw structures for the carbonyl electrophile and enolate nucleophile that react to give the enone below.
Question 1
1 pt
Question 2
1 pt
Question 3
1 pt
H
Question 4
1 pt
Question 5
1 pt
Question 6
1 pt
Question 7
1pt
Question 8
1 pt
Progress:
7/8 items
Que Feb 24 at
You do not have to consider stereochemistry.
. Draw the enolate ion in its carbanion form.
• Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner.
⚫ Separate multiple reactants using the + sign from the drop-down menu.
?
4
Shown below is the mechanism presented for the formation of biasplatin in reference 1 from the Background and Experiment document. The amounts used of each reactant are shown. Either draw or describe a better alternative to this mechanism. (Note that the first step represents two steps combined and the proton loss is not even shown; fixing these is not the desired improvement.) (Hints: The first step is correct, the second step is not; and the amount of the anhydride is in large excess to serve a purpose.)
Chapter 7 Solutions
Bundle: Chemistry: An Atoms First Approach, 2nd, Loose-Leaf + OWLv2, 4 terms (24 months) Printed Access Card
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