Consider the following reaction at 25.0°C: 2 NO 2 ( g ) ⇌ N 2 O 4 ( g ) The values of ∆H° and ∆ S ° are −58.03 kJ/mol and −176.6 J/K · mol, respectively. Calculate the value of K at 25.0°C. Assuming ∆H° and ∆S° are temperature independent, estimate the value of K at 100.0°C.
Consider the following reaction at 25.0°C: 2 NO 2 ( g ) ⇌ N 2 O 4 ( g ) The values of ∆H° and ∆ S ° are −58.03 kJ/mol and −176.6 J/K · mol, respectively. Calculate the value of K at 25.0°C. Assuming ∆H° and ∆S° are temperature independent, estimate the value of K at 100.0°C.
The values of ∆H° and ∆S° are −58.03 kJ/mol and −176.6 J/K · mol, respectively. Calculate the value of K at 25.0°C. Assuming ∆H° and ∆S° are temperature independent, estimate the value of K at 100.0°C.
Using the conditions of spontaneity to deduce the signs of AH and AS
Use the observations about each chemical reaction in the table below to decide the sign (positive or negative) of the reaction enthalpy AH and reaction entropy
AS.
Note: if you have not been given enough information to decide a sign, select the "unknown" option.
reaction
observations
conclusions
A
The reverse of this reaction is always
spontaneous but proceeds faster at
temperatures above -48. °C.
ΔΗ is
(pick one)
✓
AS is
(pick one)
B
This reaction is spontaneous except below
114. °C but proceeds at a slower rate
below 135. °C.
ΔΗ is
(pick one)
AS is
(pick one)
ΔΗ is
C
This reaction is exothermic and proceeds
faster at temperatures above -43. °C.
(pick one)
AS is
(pick one) v
Х
5
?
18
Ar
ion.
A student proposes the following Lewis structure for the perchlorate (CIO) io
:
:0:
: Cl
:
-
-
:
:0:
ك
Assign a formal charge to each atom in the student's Lewis structure.
atom
central O
formal charge
☐
top O
☐
right O
☐
bottom O
☐
Cl
☐
Decide whether these proposed Lewis structures are reasonable.
proposed Lewis structure
Yes.
Is the proposed Lewis structure reasonable?
Cl-
: 2:
:Z:
:Z:
N—N
: 0:
C C1:
O CO
No, it has the wrong number of valence electrons.
The correct number is: ☐
No, it has the right number of valence electrons but doesn't satisfy the
octet rule.
The symbols of the problem atoms are:* ☐
Yes.
No, it has the wrong number of valence electrons.
The correct number is: ☐
No, it has the right number of valence electrons but doesn't satisfy the
octet rule.
The symbols of the problem atoms are:* |
Yes.
No, it has the wrong number of valence electrons.
The correct number is:
No, it has the right number of valence electrons but doesn't satisfy the
octet rule.
The symbols of the problem atoms are:* |
If two or more atoms of the same element don't satisfy the octet rule, just enter the chemical symbol as many
times as necessary. For example, if two oxygen atoms don't satisfy the octet rule, enter "0,0".
☑
Chapter 17 Solutions
Bundle: Chemistry, 10th + Laboratory Handbook for General Chemistry, 3rd + Student Resource Center Printed Access Card + Student Solutions Manual for ... Access Card for Zumdahl/Zumdahl/DeCoste
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