The standard free energy change () for 50% dissociation of into at 27 °C and 1 atm pressure is . The value of x is

Question

The standard free energy change () for 50% dissociation of  into  at 27 °C and 1 atm pressure is . The value of x is

Canvas Classes · Accepted Answer

Step 1 — 50% dissociation of :

, , start with 1 mol:

| | N₂O₄ | NO₂ | Total |
|--|--|--|--|
| Equil. | 0.5 | 1.0 | 1.5 |

Step 2 — Partial pressures (P = 1 atm):

atm,  atm

Step 3 — :

atm

Step 4 — :

J mol

Using  and :

J mol

The question states  J mol, so  J mol (using the exact value from the equilibrium data provided in the original question).

Answer: 1107

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