Question

15. Consider the reaction 2 NO₂(g) N₂O₄(g) .

(a) Using G_f N₂O₄(g) = 97.79 kJ/mol and G_f NO₂(g) = 51.3 kJ/mol, calculate G° at 298 K.
kJ

(b) Calculate G at 298 K if the partial pressures of NO₂ and N₂O₄ are 0.35 atm and 1.60 atm, respectively.
kJ

16. Consider the reaction given below.

H₂(g) + F₂(g) 2 HF(g)

(a) Using thermodynamic data from the course website, calculate G° at 298 K.
kJ
(b) Calculate G at 298 K if the reaction mixture consists of 6.4 atm of H₂, 3.4 atm of F₂, and 0.22 atm of HF.
kJ

Answer 1

Solution : Given that a a) 2 Nod 8 AGE 11204 3 AGLE NOL → N2049 = 97079 kJ/mol = 563 l/mol. AG" 2 998 k. AG & AG (N 2 OH) -2x AG (NO2) 97079 - 2x(51.3) Heel RJ 6 AG Reki NO2 = 0.35 atm N, 04 -1.60 atm I AG = AGO + R+ Incks AG = -4840 + 8.314x298 x In C1.6.%0.353) AG 2. 1556.48 I AG 21.55 $j]

H29 + F2 9 32 HF 9, 46° 2298 kg Aci" = {xocar (4 P)]- [Aap 1+2) +Agip ) 4QP 6-82300) - Co to] AG = -546-4 ts [mol G = 298 t H2 = 6ol atm. F2 34 am HF 50:22 am 4G - 4GⓇ + RE MI (Pur] (PH2) (PE) A6 = -54654 kJ/mol x1000 + 8.314 X298 In (0.28) * -5H6HOO + 2477157 in 0.0484 604) (304) 3--546400 + 24771576-61083)21.76 2-54 6uco 15133.8124 AGS-561533.81