Question

38. The formation of SO3 from SO2 and O2 is an intermediate step in the manufacture...

38. The formation of SO3 from SO2 and O2 is an intermediate step in the manufacture of sulfuric acid, and it is also responsible for the acid rain phenomenon. The equilibrium constant KP for the reaction

2SO2(g) + O2(g) ⇌ 2SO3(g)


is 0.13 at 803

°

C. In one experiment, 2.00 mol SO2 and 2.00 mol O2 were initially present in a flask.

What must

be the total pressure at equilibrium in order to have an 76.0% yield of SO3?

b.The equilibrium constant KP for the following reaction is found to be 4.31

×

10−4 at 375

°

C.

N2(g) + 3H2(g) ⇆ 2NH3(g)


In a certain experiment a student starts with

0.942 atm of N2

and

0.433 atm of H2

in a

constant-volume

vessel at 375

°

C. Calculate the partial pressures of all species when equilibrium is reached.

PN2 = atm

PH2 = atm

PNH3 = atm

Homework Answers

Answer #1

38)

2SO2(g) + O2(g) ⇌ 2SO3(g)

2.0          2.0               0

2-2x         2-x               2x

at equilibrium 76% of SO3 obtained

moles of SO3 = 0.76 x 2 = 1.52 mol

at equilibrium :

moles of SO3 = 1.52

moles of SO2 = 0.48

moles of O2 = 1.24

total moles = 1.52 + 0.48 + 1.24 = 3.24

mole fraction of SO2 = 0.48 / 3.24 = 0.148

mole fraction of O2 = 1.24 / 3.24 = 0.383

mole fraction of SO3 = 1.52 / 3.24 = 0.469

let us assume :

total pressure = P atm

PSO2 = mole fraction x total pressure

PSO2 = 0.148 x P

PO2 = 0.383 x P

PSO3 = 0.469 x P

Kp = (PSO3)^2 / (PSO2)^2 x PO2

0.13 = (0.469 P)^2 / (0.148P)^2 x (0.383P)

P = 201.7

total pressure = 201.7 atm

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
38. The formation of SO3 from SO2 and O2 is an intermediate step in the manufacture...
38. The formation of SO3 from SO2 and O2 is an intermediate step in the manufacture of sulfuric acid, and it is also responsible for the acid rain phenomenon. The equilibrium constant KP for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) is 0.13 at 803°C. In one experiment, 2.00 mol SO2 and 2.00 mol O2 were initially present in a flask. What must be the total pressure at equilibrium in order to have an 76.0% yield of SO3? ____atm
The formation of SO3 from SO2 and O2 is an intermediate step in the manufacture of...
The formation of SO3 from SO2 and O2 is an intermediate step in the manufacture of sulfuric acid, and it is also responsible for the acid rain phenomenon. The equilibrium constant KP for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) is 0.13 at 803°C. In one experiment, 2.00 mol SO2 and 2.00 mol O2 were initially present in a flask. What must be the total pressure at equilibrium in order to have an 61.0% yield of SO3?
8.51 mol of SO2, 7.65 mol of O2 and 4.92 mol of SO3 are placed in...
8.51 mol of SO2, 7.65 mol of O2 and 4.92 mol of SO3 are placed in a 4.4L reaction vessel at a certain temperature. 2SO2(g)+O2(g)=2SO3(g) What is the reaction quotient (Q) and which way will the reaction shift if the Kc value is 0.38
At 1000 K , Kp=1.85 for the reaction SO2(g)+12O2(g)???SO3(g) What is the value of Kp for...
At 1000 K , Kp=1.85 for the reaction SO2(g)+12O2(g)???SO3(g) What is the value of Kp for the reaction SO3(g)???SO2(g)+12O2(g) What is the value of Kp for the reaction 2SO2(g)+O2(g)???2SO3(g)          What is the value of Kc for the reaction in part (b)?        
1)A reaction vessel at 27 ∘C contains a mixture of SO2(P= 3.10 atm ) and O2(P=...
1)A reaction vessel at 27 ∘C contains a mixture of SO2(P= 3.10 atm ) and O2(P= 1.00 atm ). When a catalyst is added the reaction 2SO2(g)+O2(g)⇌2SO3(g) takes place. At equilibrium the total pressure is 3.85 atm. -Find the value of Kc. 2)A sample of SO3 is introduced into an evacuated sealed container and heated to 600 K. The following equilibrium is established: 2SO3(g)⇌2SO2(g)+O2(g). The total pressure in the system is found to be 3.0 atm and the mole fraction...
At 900 K the following reaction has Kp=0.345: 2SO2(g)+O2(g)⇌2SO3(g) In an equilibrium mixture, the partial pressures...
At 900 K the following reaction has Kp=0.345: 2SO2(g)+O2(g)⇌2SO3(g) In an equilibrium mixture, the partial pressures of SO2 and O2 are 0.120 atm and 0.470 atm, respectively. What is the equilibrium partial pressure of SO3 in the mixture? Express the pressure in atmospheres to three significant digits.
4. At a given temperature, the equilibrium constant Kc for the reaction 2SO2(g) + O2(g) ⇌...
4. At a given temperature, the equilibrium constant Kc for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) is 3.0x10^9 . If 1.00 mol of SO2 and 2.00 mol of O2 are placed in a 1.00 L container and allowed to react to equilibrium at this temperature, what is the concentration of SO3 at equilibrium? a) 0.500 M b) 1.00 M c) 2.00 M d) 3.87 x10^4 M e) none of these
17. The initial concentrations or pressures of reactants and products are given for each of the...
17. The initial concentrations or pressures of reactants and products are given for each of the following systems. Calculate the reaction quotient and determine the direction in which each system will proceed to reach equilibrium. (a) 2NH3 (g) ⇌ N2 (g) + 3H2 (g) Kc = 17; [NH3] = 0.20 M, [N2] = 1.00 M, [H2] = 1.00 M (b) 2NH3 (g) ⇌ N2 (g) + 3H2 (g) KP = 6.8 × 104 ; initial pressures: NH3 = 3.0 atm,...
Consider the following threeequilibria at 400oC 2SO2(g) + O2(g) ⇌ 2SO3(g) Kp=3.5×105 SO3(g) +H2O(g)⇌H2SO4(g) Kp =8.0×10^−12...
Consider the following threeequilibria at 400oC 2SO2(g) + O2(g) ⇌ 2SO3(g) Kp=3.5×105 SO3(g) +H2O(g)⇌H2SO4(g) Kp =8.0×10^−12 H2O(g)⇌2H2(g) + O2(g) Kp=1.3×10^−33 What is Kc at 400oC for the following equilibrium? SO2(g) +O2(g)+ H2(g)⇌H2SO4(g)
A reaction vessel at 27 ∘C contains a mixture of SO2(P= 3.10 atm ) and O2(P=...
A reaction vessel at 27 ∘C contains a mixture of SO2(P= 3.10 atm ) and O2(P= 1.10 atm ). When a catalyst is added the reaction 2SO2(g)+O2(g)⇌2SO3(g) takes place. At equilibrium the total pressure is 3.95 atm . Find the value of Kc.