(A) Dinitrogen pentoxide, N₂O₅, is a solid with a high vapor pressure. Its vapor pressure at 7.5 °C is 100 mmHg, and the solid sublimes at a pressure of 1.00 atm at 32.4 °C. What is Δ_rG° 25 °C for the reaction N₂O₅(s) → N₂O₅(g)?

(B) A plausible reaction for the production of ethylene glycol (used as antifreeze) is

The following thermodynamic properties of CH₂(OH)CH₂OH(l) at 25 °C are given: Δ_fH° = -454.8 kJ mol^-1 and Δ_fG° = -323.1 kJ mol^-1. Use these data, together with values, to obtain a value of S°, the standard molar entropy of CH₂(OH)CH₂OH(l) at 25 °C.

Transcribed Image Text:

2 CO(g) + 3H₂(g) →→→ CH₂(OH)CH₂OH(1)