Question 1

Consider the following reaction: What is K_eq for this reaction at 25 °C? A)e^-464 B)e⁴⁶⁴ C)1.59 D)0.63 E)252

Accepted Answer

The answer of Consider the following reaction: What is K_eq for...

Question 2

What is Δ_rG°? A)-24.8 kJ B)-299.2 kJ C)+24.8 kJ D)149.6 kJ E)+299.2 kJ

Accepted Answer

The answer of What is Δ_rG°? A)-24.8 kJ B)-299.2 kJ C)+24.8 kJ D)149.6 kJ E)+299.2...

Question 3

Consider the reaction: What is Δ_rG° for this reaction at 591 K? Is the reaction spontaneous at 591 K? A)-196 kJ/mol,no B)196 kJ/mol,yes C)196 kJ/mol,no D)239 kJ/mol,yes E)-239 kJ/mol,no

Accepted Answer

The answer of Consider the reaction: What is Δ_rG° for this...

Question 4

What is ?_rG°? A)1338 kJ B)918 kJ C)-130 kJ D)-918 kJ E)130 kJ

Accepted Answer

The answer of What is ?_rG°? A)1338 kJ B)918 kJ C)-130 kJ D)-918 kJ E)130...

Question 5

For CO(g)+ H₂(g)→ H₂CO(g),Δ_rH° = -5.36 kJ/mol,and Δ_rS° = -109.8 J/mol K.What is Δ_rG° in kJ/mol at 300 K? A)-38.3 kJ/mol B)57.6 kJ/mol C)38.3 kJ/mol D)27.6 kJ/mol E)-57.6 kJ/mol

Accepted Answer

Δ_rG° can be calculated using the formula Δ_rG° = Δ_rH° - TΔ_rS°. Substituting the given values: Δ_rG° = -5.36 kJ/mol - (300 K)(-109.8 J/mol K)(1 kJ/1000 J) = 27.6 kJ/mol.

Question 6

For CdO(s)+ SO₃(g)→ CdSO₄(s),Δ_rH° = -279.4 kJ/mol,and Δ_rS° = -118.4 J/mol K.What is Δ_rG° in kJ/mol at 127 K? A)-256 kJ/mol B)-303 kJ/mol C)-264 kJ/mol D)-355 kJ/mol E)-460 kJ/mol

Accepted Answer

Δ_rG° = Δ_rH° - TΔ_rS° Plugging in the given values: Δ_rG° = -279.4 kJ/mol - (127 K)(-118.4 J/mol K)/1000 = -263.6 kJ/mol ≈ -264 kJ/mol Therefore, the best choice is C.

Question 7

For the reaction N₂O₃(g)→ NO(g)+ NO₂(g)Δ_rG° = -4.78 kJ/mol.Calculate K_eq at 25 °C. A)1.023 B)1.002 C)1.005 D)0.9484 E)0.9981

Accepted Answer

We can use the expression for the equilibrium constant, which is:

K_eq = e^(-ΔG°/RT)

where R is the gas constant and T is the temperature in Kelvin. Plugging in the values given,

ΔG° = -4.78 kJ/mol = -4780 J/mol
R = 8.314 J/(mol·K)
T = 25°C = 298 K

K_eq = e^(-(-4780)/(8.314·298)) = 1.002

Therefore, the answer is B (1.002).

Question 8

For Cl₂O(g)+ 3/2 O₂(g)→ 2 ClO₂ ,Δ_rH° = 126 kJ/mol,and Δ_rS° = -74.9 J/mol K at 377 °C.What is Δ_rG° in kJ/mol? A)77.8 B)51.4 C)98.3 D)175 E)129.2

Accepted Answer

The answer of For Cl₂O(g)+ 3/2 O₂(g)→ 2 ClO₂ ,Δ_rH°...

Question 9

Consider the reaction: N₂O₄(g)? 2 NO₂(g) What is ?_rG° for this reaction at 20 °C? A)0.36 kJ/mol B)-5.4 kJ /mol C)4.9 kJ/mol D)5.3 kJ/mol E)5.4 kJ/mol

Accepted Answer

The answer of Consider the reaction: N₂O₄(g)? 2 NO₂(g) What is...

Question 10

What is Δ_rG°? A)149.1 kJ B)-4.8 kJ C)-46.5 kJ D)4.8 kJ E)46.5 kJ

Accepted Answer

The answer of What is Δ_rG°? A)149.1 kJ B)-4.8 kJ C)-46.5 kJ D)4.8 kJ E)46.5...

Question 11

For the reaction SO₂(g)+ Cl₂(g)→ SO₂Cl₂(g)K_eq = 0.377 at 25 °C,what is Δ_rG° for the reaction? A)202.7 J/mol B)88.02 J/mol C)2420 J/mol D)1049 J/mol E)-1049 J/mol

Accepted Answer

The answer of For the reaction SO₂(g)+ Cl₂(g)→ SO₂Cl₂(g)K_eq =...

Question 12

Consider the reaction: What is Δ_rG° for this reaction in kJ at 500 K? A)93 kJ B)151 kJ C)365 kJ D)-1.00 × 10⁵ kJ E)441 kJ

Accepted Answer

The answer of Consider the reaction: What is Δ_rG° for this...

Question 13

Calculate Δ_rG° for the reaction Cu(s)+ H₂O(g)→ CuO(s)+ H₂(g)at 500 K. A)231.8 kJ B)-135.4 kJ C)-58.6 kJ D)110.6 kJ E)86.74 kJ

Accepted Answer

The answer of Calculate Δ_rG° for the reaction Cu(s)+ H₂O(g)→...

Question 14

Consider the following reaction: What is K_eq for this reaction at 25 °C? A)e³²⁴ B)e^-324 C)e¹⁶² D)e^-162 E)1.38

Accepted Answer

The answer of Consider the following reaction: What is K_eq for...

Question 15

What is Δ_rG°? A)326.2 kJ B)-326.4 kJ C)-163.2 kJ D)163.2 kJ E)54.4 kJ

Accepted Answer

The answer of What is Δ_rG°? A)326.2 kJ B)-326.4 kJ C)-163.2 kJ D)163.2 kJ E)54.4...

Question 16

Consider the following reaction: What is Δ_rG° for this reaction in kJ? A)-1282 B)-1149 C)-169 D)169 E)1149

Accepted Answer

The answer of Consider the following reaction: What is Δ_rG° for...

Question 17

For the reaction PCl₅(g)→ PCl₃(g)+ Cl₂(g)at 298 K,K_eq = 1.87 × 10^-7,Δ_rS° = 181.92 J/mol K.Compute Δ_rH° for this reaction. A)15.8 kJ/mol B)220 kJ/mol C)143 kJ/mol D)54.2 kJ/mol E)92.6 kJ/mol

Accepted Answer

The answer of For the reaction PCl₅(g)→ PCl₃(g)+ Cl₂(g)at 298...

Question 18

For the reaction I₂(s)+ Cl₂(g)→ 2 ICl(g),Δ_rH° = 36 kJ and Δ_rS° = 158.8 J/K at 25 °C.Calculate Δ_rG° for the process at 25 °C. A)-11.3 kJ B)-4730 kJ C)-393 kJ D)32 kJ E)83.3 kJ

Accepted Answer

ΔG° = ΔH° - TΔS° = 36 kJ - (298 K)(158.8 J/K)(1 kJ/1000 J) = 36 kJ - 47.3 kJ = -11.3 kJ.

Question 19

For a reaction K_eq = 1.2 × 10^-6 at T = 200 K.What is Δ_rG° for the reaction? A)-22.7 kJ/mol B)53.6 kJ/mol C)22.7 kJ/mol D)-53.6 kJ/mol E)170 kJ/mol

Accepted Answer

Using the equation ΔG° = -RTln(K), where R is the gas constant and T is the temperature in Kelvin, we can find ΔG° for the reaction:

ΔG° = -RTln(K)
ΔG° = -(8.314 J/mol·K)(200 K)ln(1.2 × 10^-6)
ΔG° = 22.7 kJ/mol

Note that we use ln instead of log because the value of K is very small.

Therefore, the correct choice is C.

Question 20

Consider the reaction: H₂X(g)→ HX(g)+ X(g) Δ_rH° = 18.4 kJ/mol Δ_rS°= 23.1 J/mol K What is K_eq for this reaction at 525 K? A)0.387 B)0.993 C)0.238 D)4.23 E)1.01

Accepted Answer

The answer of Consider the reaction: H₂X(g)→ HX(g)+ X(g) Δ_rH° = 18.4...

Quiz 13: Spontaneous Change: Entropy and Gibbs Energy

Consider the following reaction: What is K_eq for this reaction at 25 °C?

What is Δ_rG°?

Consider the reaction: What is Δ_rG° for this reaction at 591 K? Is the reaction spontaneous at 591 K?

What is ?_rG°?

For CO(g) + H₂(g) → H₂CO(g) ,Δ_rH° = -5.36 kJ/mol,and Δ_rS° = -109.8 J/mol K.What is Δ_rG° in kJ/mol at 300 K?

For CdO(s) + SO₃(g) → CdSO₄(s) ,Δ_rH° = -279.4 kJ/mol,and Δ_rS° = -118.4 J/mol K.What is Δ_rG° in kJ/mol at 127 K?

For the reaction N₂O₃(g) → NO(g) + NO₂(g) Δ_rG° = -4.78 kJ/mol.Calculate K_eq at 25 °C.

For Cl₂O(g) + 3/2 O₂(g) → 2 ClO₂ ,Δ_rH° = 126 kJ/mol,and Δ_rS° = -74.9 J/mol K at 377 °C.What is Δ_rG° in kJ/mol?

Consider the reaction: N₂O₄(g) ? 2 NO₂(g) What is ?_rG° for this reaction at 20 °C?

What is Δ_rG°?

For the reaction SO₂(g) + Cl₂(g) → SO₂Cl₂(g) K_eq = 0.377 at 25 °C,what is Δ_rG° for the reaction?

Consider the reaction: What is Δ_rG° for this reaction in kJ at 500 K?

Calculate Δ_rG° for the reaction Cu(s) + H₂O(g) → CuO(s) + H₂(g) at 500 K.

Consider the following reaction: What is K_eq for this reaction at 25 °C?

What is Δ_rG°?

Consider the following reaction: What is Δ_rG° for this reaction in kJ?

For the reaction PCl₅(g) → PCl₃(g) + Cl₂(g) at 298 K,K_eq = 1.87 × 10^-7,Δ_rS° = 181.92 J/mol K.Compute Δ_rH° for this reaction.

For the reaction I₂(s) + Cl₂(g) → 2 ICl(g) ,Δ_rH° = 36 kJ and Δ_rS° = 158.8 J/K at 25 °C.Calculate Δ_rG° for the process at 25 °C.

For a reaction K_eq = 1.2 × 10^-6 at T = 200 K.What is Δ_rG° for the reaction?

Consider the reaction: H₂X(g) → HX(g) + X(g) Δ_rH° = 18.4 kJ/mol Δ_rS°= 23.1 J/mol K What is K_eq for this reaction at 525 K?

Quiz 13: Spontaneous Change: Entropy and Gibbs Energy

Consider the following reaction: What is Keq for this reaction at 25 °C?

What is ΔrG°?

Consider the reaction: What is ΔrG° for this reaction at 591 K? Is the reaction spontaneous at 591 K?

What is ?rG°?

For CO(g) + H2(g) → H2CO(g) ,ΔrH° = -5.36 kJ/mol,and ΔrS° = -109.8 J/mol K.What is ΔrG° in kJ/mol at 300 K?

For CdO(s) + SO3(g) → CdSO4(s) ,ΔrH° = -279.4 kJ/mol,and ΔrS° = -118.4 J/mol K.What is ΔrG° in kJ/mol at 127 K?

For the reaction N2O3(g) → NO(g) + NO2(g) ΔrG° = -4.78 kJ/mol.Calculate Keq at 25 °C.

For Cl2O(g) + 3/2 O2(g) → 2 ClO2 ,ΔrH° = 126 kJ/mol,and ΔrS° = -74.9 J/mol K at 377 °C.What is ΔrG° in kJ/mol?

Consider the reaction: N2O4(g) ? 2 NO2(g) What is ?rG° for this reaction at 20 °C?

What is ΔrG°?

For the reaction SO2(g) + Cl2(g) → SO2Cl2(g) Keq = 0.377 at 25 °C,what is ΔrG° for the reaction?

Consider the reaction: What is ΔrG° for this reaction in kJ at 500 K?

Calculate ΔrG° for the reaction Cu(s) + H2O(g) → CuO(s) + H2(g) at 500 K.

Consider the following reaction: What is Keq for this reaction at 25 °C?

What is ΔrG°?

Consider the following reaction: What is ΔrG° for this reaction in kJ?

For the reaction PCl5(g) → PCl3(g) + Cl2(g) at 298 K,Keq = 1.87 × 10-7,ΔrS° = 181.92 J/mol K.Compute ΔrH° for this reaction.

For the reaction I2(s) + Cl2(g) → 2 ICl(g) ,ΔrH° = 36 kJ and ΔrS° = 158.8 J/K at 25 °C.Calculate ΔrG° for the process at 25 °C.

For a reaction Keq = 1.2 × 10-6 at T = 200 K.What is ΔrG° for the reaction?

Consider the reaction: H2X(g) → HX(g) + X(g) ΔrH° = 18.4 kJ/mol ΔrS°= 23.1 J/mol K What is Keq for this reaction at 525 K?

Consider the following reaction: What is K_eq for this reaction at 25 °C?

What is Δ_rG°?

Consider the reaction: What is Δ_rG° for this reaction at 591 K? Is the reaction spontaneous at 591 K?

What is ?_rG°?

For CO(g) + H₂(g) → H₂CO(g) ,Δ_rH° = -5.36 kJ/mol,and Δ_rS° = -109.8 J/mol K.What is Δ_rG° in kJ/mol at 300 K?

For CdO(s) + SO₃(g) → CdSO₄(s) ,Δ_rH° = -279.4 kJ/mol,and Δ_rS° = -118.4 J/mol K.What is Δ_rG° in kJ/mol at 127 K?

For the reaction N₂O₃(g) → NO(g) + NO₂(g) Δ_rG° = -4.78 kJ/mol.Calculate K_eq at 25 °C.

For Cl₂O(g) + 3/2 O₂(g) → 2 ClO₂ ,Δ_rH° = 126 kJ/mol,and Δ_rS° = -74.9 J/mol K at 377 °C.What is Δ_rG° in kJ/mol?

Consider the reaction: N₂O₄(g) ? 2 NO₂(g) What is ?_rG° for this reaction at 20 °C?

What is Δ_rG°?

For the reaction SO₂(g) + Cl₂(g) → SO₂Cl₂(g) K_eq = 0.377 at 25 °C,what is Δ_rG° for the reaction?

Consider the reaction: What is Δ_rG° for this reaction in kJ at 500 K?

Calculate Δ_rG° for the reaction Cu(s) + H₂O(g) → CuO(s) + H₂(g) at 500 K.

Consider the following reaction: What is K_eq for this reaction at 25 °C?

What is Δ_rG°?

Consider the following reaction: What is Δ_rG° for this reaction in kJ?

For the reaction PCl₅(g) → PCl₃(g) + Cl₂(g) at 298 K,K_eq = 1.87 × 10^-7,Δ_rS° = 181.92 J/mol K.Compute Δ_rH° for this reaction.

For the reaction I₂(s) + Cl₂(g) → 2 ICl(g) ,Δ_rH° = 36 kJ and Δ_rS° = 158.8 J/K at 25 °C.Calculate Δ_rG° for the process at 25 °C.

For a reaction K_eq = 1.2 × 10^-6 at T = 200 K.What is Δ_rG° for the reaction?

Consider the reaction: H₂X(g) → HX(g) + X(g) Δ_rH° = 18.4 kJ/mol Δ_rS°= 23.1 J/mol K What is K_eq for this reaction at 525 K?