Solid ammonium iodide decomposes to ammonia and hydrogen gases at sufficiently high temperatures. NH 4 I ( s ) ⇌ NH 3 ( g ) + HI ( g ) The equilibrium constant for the decomposition at 400°C is 0.215. Twenty grams of ammonium iodide are sealed in a 7.50-L flask and heated to 400°C. (a) What is the total pressure in the flask at equilibrium? (b) How much solid NH 4 I is left after the decomposition?
Solid ammonium iodide decomposes to ammonia and hydrogen gases at sufficiently high temperatures. NH 4 I ( s ) ⇌ NH 3 ( g ) + HI ( g ) The equilibrium constant for the decomposition at 400°C is 0.215. Twenty grams of ammonium iodide are sealed in a 7.50-L flask and heated to 400°C. (a) What is the total pressure in the flask at equilibrium? (b) How much solid NH 4 I is left after the decomposition?
Solution Summary: The author explains that the total pressure of the gases at equilibrium is 0.927 atm.
Solid ammonium iodide decomposes to ammonia and hydrogen gases at sufficiently high temperatures.
NH
4
I
(
s
)
⇌
NH
3
(
g
)
+
HI
(
g
)
The equilibrium constant for the decomposition at 400°C is 0.215. Twenty grams of ammonium iodide are sealed in a 7.50-L flask and heated to 400°C.
(a) What is the total pressure in the flask at equilibrium?
(b) How much solid NH4I is left after the decomposition?
2. A graph shown below shows first ionization energies for elements from H to Ne.
First ionization energy/kJ mol
2500
2000
1500
1000
500
T
T
T
T
1
2
3
5
6
7
8
9
10
Atomic number
a) Using arguments of electronic structure, explain why ionization energy of Li is much
lower than that of H.
(2 points)
then dips at O.
b) Using the same arguments, explain why ionization energy increases from B to N, and
(3 points)
Give the name of this compound, including stereochemistry if relevant:
CICH2
CH3
Br
CH₂CH=CH2
Write in the product, including stereochemistry where relevant, for these
reactions. See end of ch. 8, p. 301-303.
1. 03
a) 2-methyl-2-pentene
->
2. Zn, H*
Br2
b) 1-ethylcyclopentene
-->
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Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell
Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell