Author Question: Consider the reaction 2NO2(g) N2O4(g); H = 56.8 kJ and S = 175 J/K. In a container (at 298 K) ... (Read 156 times)

CORALGRILL2014 · **on:** Mar 21, 2021

Question 1

Consider the gas phase reaction NO +

O

₂

NO

₂

for which Δ

H°

= –57.04 kJ and

K

= 1.48

10

⁶

at 25°C.

CalculateΔS°at 25°C for the following reaction:

2NO + O₂

2NO₂

Reference: Ref 17-6

◦ 236 J/K
◦ –147 J/K
◦ –236 J/K
◦ –265 J/K
◦ 265 J/K

Question 2

Consider the reaction 2NO₂(g)

N₂O₄(g); ΔH° = –56.8 kJ and ΔS° = –175 J/K. In a container (at 298 K) N₂O₄(g) and NO₂(g) are mixed with initial partial pressures of 2.4 atm and 0.42 atm, respectively. Which of the following statements is correct?

◦ Some N₂O₄(g) will decompose into NO₂(g).
◦ Some NO₂(g) will dimerize to form N₂O₄(g).
◦ The system is at equilibrium at these initial pressures.
◦ The final total pressure must be known to answer this question.
◦ None of these are correct.

ASDFGJLO · **Reply #1 on:** Mar 21, 2021

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