Formaldehyde is an important industrial solvent and also a raw material in chemical manufacture. At elevated temperatures, it dissociates into ammonia and carbon monoxide in the following gas-phase reaction: 

a. Compute the equilibrium constant for this reaction over the temperature range of 400 to 500 K. 

b. One mole of formaldehyde is placed in an evacuated 25-liter vessel and heated. Compute the equilibrium pressure and mole fractions of all species over the temperature range of 400 to 500 K. 

c. Repeat the calculation of part (b) if, instead of being evacuated, the 25-liter vessel initially contains air (21 mol % O₂ and 79 mol % N₂) at ambient conditions. Assume there is no reaction of oxygen with any of the components in the formaldehyde dissociation reaction at these temperatures.

Transcribed Image Text:

HCONH₂NH3 + CO