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) →→→NH.Cl(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 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 Calculate AG for the reaction 4) COO CO2(g) CO + 1/202) A) 523 let C() +1/202) Ca+ O₂ -> CO₂(g) C) 5.3x10* 2 NO(g) + O2(g); rate=k[N₂0] C) 0.69 s¹ AG=?? AG-454.4 kJ AG-257.2 kl D) 0.32 ¹

Principles of Modern Chemistry
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ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
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Chapter12: Thermodynamic Processes And Thermochemistry
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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
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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