Answer:
The value of equilibrium constant at 2000 C is .
Explanation:
To calculate of the reaction, we use Van't Hoff equation, which is:
where,
= vapor pressure at temperature
= vapor pressure at temperature
= Enthalpy change of the reaction= ?
R = Gas constant = 8.314 J/mol K
We have :
Enthalpy of formation of nitrogen gas ,
Enthalpy of formation of oxygen gas ,
Enthalpy of formation of NO gas ,
Enthalpy of the reaction =
Equilibrium constant at 25°C =
Equilibrium constant at 2,000°C =
By using Van't Hoff equation, te can be calculated:
The value of equilibrium constant at 2000 C is .