Principles of Modern Chemistry
8th Edition
ISBN: 9781305079113
Author: David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher: Cengage Learning
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Q 3 and Q 4 please
![Hint: (molar mass of H-1, N-14g/mol), (R-0.0821 L.atm/K.mol), (The specific heat of water is 4.184J/g. C)
.
1) Estimate the temperature where AG=0 for the following reaction: (Given: AH--195 kJ and
AS-284.5 J/K) CAUTION: Beware of units.NH3(g) + HCl(g)->NH4Cl(s)
A) 685 K
B) 467 K
C) 582 K
D) 634 K
2) Consider the reaction represented by the equation: N₂(g) + 3H₂(g) <-> 2NH3(g) Calculate the
equilibrium pressures at a certain temperature: PNH,-3.7 x 10 atm, PN-8.9x10 atm, PH:-2.9x 10 atm
A) 6.3x10*
B) 2.9x104
C) 5.3x10
D) 4.9 x10
3) Consider the following reaction:
2 N₂O(g)
If the half-life for the reaction is 0.810 s, the rate constant is:
A) 1.1 s¹¹
B) 0.86 s¹
4) Calculate AG for the reaction
->
COⓇ
CO₂(g)
CO
C) + 1/202)
Ca) + O₂
+1/202- CO₂(g)
A) 523 kJ
2 NO(g) + O₂(g); rate=1
C) 0.69 s¹
AG=??
AG°-454.4 kJ
AG=-257.2 kJ
C) 197.2 kJ
k[N₂0]
B)-265.8 kJ
D) 651.6 kJ
5) The volume of a sample of nitrogen N₂ is 9 L at 31°C and 732 torr. What volume will it occupy at STP?
A) 6.59 L
B) 7.18 L
C) 6.90 L
D) 7.78 L
6)
Which of the following pure substances exhibits hydrogen bonding?
A) HCI
B) H₂S
C) CH₂
D) 0.32 s¹
D) H₂O
7)
A particular vinegar solution has a H₂O* concentration of 0.0185 M. What is the pOH of the solution?
A) 10.7
B) 17.3
C) 12.3
D) 15.8
8)
What mass of ethylene glycol (M.W. = 62.1 g/mol) antifreeze must be added to 8.0 liters of water to
produce a solution that freezes at -23.3 C degrees. Density of water is 1 g/ml and Kr-186° C/m.
A) 3.41 g
B) 6.22 Kg
C) 7.81 kg
=
D) 0.78 kg
11) The OH concentration in a 0.09M of Ca(OH)2 solution is
A) 0.0075 M
B) 0.18 M
9) How much heat is required to raise the temperature of 1.5 g of water from 25°C to 27°C?
A) 12.55 kJ
B) 6.27 kJ
C) 1.55 kJ
D) 40.5 kJ
10) Calculate the osmotic pressure associated with 90.0 g of an enzyme of molecular weight 98,000 g/mol
dissolved in 2900 mL of benzene at 30.0 °C.
A) 5.99 torr
B) 1.96 torr
C) 0.484 torr
D) 2.48 torr
C) 1.3x10-12 M
D) 1x107 M
12) A solution of 7.00 MHCHO2 is 0.57% ionized in water. Calculate the Ka value for the acid (HCHO₂).
A) 2.5x10-³
B) 0.2x10-³
C) 2.3x104
D) 0.23](https://content.bartleby.com/qna-images/question/48079d7c-7248-4f29-b2fc-02e5764ca6aa/d4cd5f6d-b906-4420-9c36-982fb31cca52/comc3j_processed.jpeg)
Transcribed Image Text:Hint: (molar mass of H-1, N-14g/mol), (R-0.0821 L.atm/K.mol), (The specific heat of water is 4.184J/g. C)
.
1) Estimate the temperature where AG=0 for the following reaction: (Given: AH--195 kJ and
AS-284.5 J/K) CAUTION: Beware of units.NH3(g) + HCl(g)->NH4Cl(s)
A) 685 K
B) 467 K
C) 582 K
D) 634 K
2) Consider the reaction represented by the equation: N₂(g) + 3H₂(g) <-> 2NH3(g) Calculate the
equilibrium pressures at a certain temperature: PNH,-3.7 x 10 atm, PN-8.9x10 atm, PH:-2.9x 10 atm
A) 6.3x10*
B) 2.9x104
C) 5.3x10
D) 4.9 x10
3) Consider the following reaction:
2 N₂O(g)
If the half-life for the reaction is 0.810 s, the rate constant is:
A) 1.1 s¹¹
B) 0.86 s¹
4) Calculate AG for the reaction
->
COⓇ
CO₂(g)
CO
C) + 1/202)
Ca) + O₂
+1/202- CO₂(g)
A) 523 kJ
2 NO(g) + O₂(g); rate=1
C) 0.69 s¹
AG=??
AG°-454.4 kJ
AG=-257.2 kJ
C) 197.2 kJ
k[N₂0]
B)-265.8 kJ
D) 651.6 kJ
5) The volume of a sample of nitrogen N₂ is 9 L at 31°C and 732 torr. What volume will it occupy at STP?
A) 6.59 L
B) 7.18 L
C) 6.90 L
D) 7.78 L
6)
Which of the following pure substances exhibits hydrogen bonding?
A) HCI
B) H₂S
C) CH₂
D) 0.32 s¹
D) H₂O
7)
A particular vinegar solution has a H₂O* concentration of 0.0185 M. What is the pOH of the solution?
A) 10.7
B) 17.3
C) 12.3
D) 15.8
8)
What mass of ethylene glycol (M.W. = 62.1 g/mol) antifreeze must be added to 8.0 liters of water to
produce a solution that freezes at -23.3 C degrees. Density of water is 1 g/ml and Kr-186° C/m.
A) 3.41 g
B) 6.22 Kg
C) 7.81 kg
=
D) 0.78 kg
11) The OH concentration in a 0.09M of Ca(OH)2 solution is
A) 0.0075 M
B) 0.18 M
9) How much heat is required to raise the temperature of 1.5 g of water from 25°C to 27°C?
A) 12.55 kJ
B) 6.27 kJ
C) 1.55 kJ
D) 40.5 kJ
10) Calculate the osmotic pressure associated with 90.0 g of an enzyme of molecular weight 98,000 g/mol
dissolved in 2900 mL of benzene at 30.0 °C.
A) 5.99 torr
B) 1.96 torr
C) 0.484 torr
D) 2.48 torr
C) 1.3x10-12 M
D) 1x107 M
12) A solution of 7.00 MHCHO2 is 0.57% ionized in water. Calculate the Ka value for the acid (HCHO₂).
A) 2.5x10-³
B) 0.2x10-³
C) 2.3x104
D) 0.23
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Chemical kinetics can be defined as the branch of chemistry that deals with rates of chemical reactions It tells us about speed of reaction whetther reaction is slow or fast.
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