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
)
Predict the organic products that form in the reaction below:
+ OH
+H
H+
➤ ☑ X -
Y
Note: You may assume you have an excess of either reactant if the reaction requires more than one of those molecules to form the products.
In the drawing area below, draw the skeletal ("line") structures of the missing organic products X and Y. You may draw the structures in any arrangement that
you like, so long as they aren't touching.
Click and drag to start drawing a
structure.
G
Predict the organic products that form in the reaction below:
OH
H+
H+
+
☑
Y
Note: You may assume you have an excess of either reactant if the reaction requires more than one of those molecules to form the products.
In the drawing area below, draw the skeletal ("line") structures of the missing organic products X and Y. You may draw the structures in any arrangement that
you like, so long as they aren't touching.
Click and drag to start drawing a
structure.
✓
m
Determine the structures of the missing organic molecules in the following reaction:
+ H₂O
+H
H+
Y
Z
☑
☑
Note: Molecules that share the same letter have the exact same structure.
In the drawing area below, draw the skeletal ("line") structures of the missing organic molecules X, Y, and Z. You may draw the structures in any arrangement
that you like, so long as they aren't touching. Molecule X shows up in multiple steps, but you only have to draw its structure once.
Click and drag to start drawing a structure.
AP
+
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