Answer to Question #187822 in Physical Chemistry for Quanny

Question

Consider the synthesis reaction of ammonia at 500°C:

N2(g) + 3 H2(g) --> 2 NH3(g)

a- Give the expression of the standard enthalpy of this reaction as a function of the temperature T.

b- What is the relative difference between the two values of ∆rH0 obtained respectively at 25°C and 500°C. Comment.

Answer 1

a).N2(g) + 3 H2(g) --> 2 NH3(g)

∆H° =500

b) 500 - 25/25

= 19