Exercise 17.61 Consider the following reaction: 2NO( g )+O2( g )2NO2( g ) Estima

Question

Exercise 17.61

Consider the following reaction:
2NO(g)+O2(g)2NO2(g)
Estimate G for this reaction at each of the following temperatures and predict whether or not the reaction will be spontaneous. (Assume that H and S do not change too much within the give temperature range.)

Part A

298 K

SubmitMy AnswersGive Up

Part B

732 K

SubmitMy AnswersGive Up

Part C

846 K

Express your answer using two significant figures.

SubmitMy AnswersGive Up

Exercise 17.61

Consider the following reaction:
2NO(g)+O2(g)2NO2(g)
Estimate G for this reaction at each of the following temperatures and predict whether or not the reaction will be spontaneous. (Assume that H and S do not change too much within the give temperature range.)

Part A

298 K

G =   kJ  

SubmitMy AnswersGive Up

Part B

732 K

G =   kJ  

SubmitMy AnswersGive Up

Part C

846 K

Express your answer using two significant figures.

G =   kJ  

SubmitMy AnswersGive Up

Explanation / Answer

First you need to determine the delta H and delta S for the reaction.

Use delta H formation and delta S formation for this

delta H0 rxn = delta Hf(products) - deltaH(reactants)

= 2 x 33.2 kJ - (2 x 90.2)

= -114 kJ

delta S0 rxn = delta Sf(products) - deltaS(reactants)

= 2 x 240 J - (2 x 210.7 + 205)

= -146.4 J

delta G = delta H - T delta S

At 298 K

delta G = -114 kJ - 298 x -146.4

delta G = -70.37 kJ

At 732 K

delta G = -114 kJ - 732 x -146.4

delta G = -6.83 kJ

At 846 K

delta G = -114 kJ - 846 x -146.4

delta G = 9.85 kJ

Related Questions

Navigate

• Browse (All)
• Browse E
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.