Question

If k= 2.944×10-2 mol L-1 s

-1 then the reaction is

a. Zero order b. First order

c. Second order d. None of these​

Answer 1

Answer:

a. Zero order

Explanation:

According to rate equation of Zero order,

 dx/dt = k

where

dx = change in concentration and

dt = time taken

For example:

Let,

dx = Change in concentration be 1 mol/L

dt = time taken be 1 s   for a reaction.

Therefore, substituting the values, we get

( 1 mol/L)/(1 s) = k

this implies  k = 1 mol/L.s

So, the reaction is zero order.

Answer 2

If k = 2.944 × 10⁻² mol L⁻¹ s⁻¹, then the reaction is a zero order reaction.

• Units for rate constant k for a zero order reaction is mol L⁻¹ s⁻¹.
• A zero order reaction is independent of concentration.
• The half life is proportional to the initial concentration of the reactant.
• The rate of reaction is always equal to the rate constant of the reaction at all concentrations.
• The graph of concentration versus time plot will be a straight line, with a negative slope.