Question

choose the correct value of d bracket NH3 for the reaction N2 + 3 H2 gives to NH3​

Answer 1

Answer:

Explanation:

Consider the reaction: N2(g) + 3H2(g) → 2NH3(g) The equality relationship between d[NH3]/dt and -d[H2]/dt is Read more on Sarthaks.com - https://www.sarthaks.com/228978/consider-the-reaction-n2-g-3h2-2nh3-g-the-equality-relationship-between-d-nh3-dt-and-h2-dt-is

Answer 2

The complete question is :

For the reaction, N2 + 3 H2 gives 2 NH3, if d[NH3]/dt is equal to 2 *10 ^- 4 mol /L/ sec

the value of -d[H2]/dt would be

According to the rate equation of Chemical Kinetics, we know that for the reaction,

N₂ + 3 H₂ →  2NH₃,

-1/[1 d(N₂)/dt] = -1/[3 d(H₂)/dt] = 1/[2 d(NH₃)/dt ]      [Reaction coefficients of N₂,H₂,NH₃ are 1,3,2 respectively.]

It is given that, d(NH₃)/dt is equal to 2*10⁻⁴ mol /L/ sec

So,

-d(H₂)/dt = 3/2[ d(NH₃)/dt] = 3/2(2*10⁻⁴) mol/L      [By cross multiplication and

d(NH₃)/dt = 2*10⁻⁴ mol /L/ sec ]

∴ -d(H₂)/dt = 3*10⁻⁴ mol / L/sec

Thus, 3*10⁻⁴ mol / L/sec is the required answer.