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CO2(g)+N2(g) = CO(g) +N2O (reversible), exhibit the followingtemperature dependence:

temp(k) k1(M^-1S^-1) k1(M^-1S^-1)
1200 9.1E-11 1.5E5
1300 2.7E-9 2.6E5


Is this reaction endothermic or exothermic according tokinetics??

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Sixta Kovacek
Sixta KovacekLv2
28 Jul 2019
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Related questions

Listed in the table are forward and reverse rate constants for the reaction: 2NO(g)
kf
��
kr
�� N2(g) + O2(g)
Temperature (K) Kf (M-1s-1) Kr (M-1s-1)
1400 0.29 1.1×10-6
1500 1.3 1.4×10-5
(a) Determine a value for the equilibrium constant at each temperature {4 points}
(b) Is this reaction exothermic or endothermic? {1 points}



Ammonia reacts with carbon dioxide to form a solid, NH4CO2NH2 according to the following reaction:
2NH3(g) + CO2(g) ⇌ NH4CO2NH2(s)
Where Kp = 0,614 (atm-3) at 298 K. If equilibrium is established at 298 K by starting with pure solid, what is the partial
pressures of NH3 and CO2 at equilibrium? What is the total pressure at equilibrium?

The reaction of nitric oxide (NO(g)) with molecular hydrogen (H2(g)) results in the formation of nitrogen and water as follows:

2NO (g) + 2H2(g)...> N2(g) + 2H2O(g)

The experimentally determined rate-law expression for this reaction is first order in H2(g) and second order with NO(g).

a) Is the reaction above, as written an elementary reaction?

b) One potential mechanism for this reaction is as follows:

H2(g) + 2NO(g)...> N2O (g) + H2O (g) k1

H2(g) + N2O (g)...> N2(g) + H2O(g) k2

Is this mechanism consistent with the experimental rate law? If not, why?

c) An alternative mechanism for the reaction is:

2NO(g) <...> N2O2(g) (fast) k1(fwd) k-1(rev)

H2(g) + N2O2 (g)...> N2O(g) + H2O(g) k2

H2(g) + N2O (g)...> N2(g) + H2O(g) k3

Show that this mechanism is consistent with the experimental law.

Consider the following decomposition reaction and corresponding rate constants, and answer the following two questions.

 

2 A(aq)  ⇌k−1k1 B(aq)  +  C(aq)

 

Temperature k1    (M−1 s−1) k−1      (M−1 s−1)
1100 K 0.337 3.6×10−6
1500 K 3.48 3.1×10−4

A.  What is the value of Kc at 1100 K?  Enter a value accurate to three significant figures.  For scientific notation, enter 1234 as 1.23e3 or 0.1234 as 1.23e−1. 

 

 

B. Which of the following statements is correct.

 

The reaction is exothermic.
 

The reaction is endothermic.
 

There is insufficient information to tell if the reaction is endothermic or exothermic.  

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