Question

What is △n for the following equation in relating Kc to Kp?

2 Na(s) + 2 H2O(l) ⇌ 2 NaOH(aq) + H2(g)

Answer 1

-1

Step-by-step explanation:

The relation between Kp and Kc is given below:

`K_p= K_c* (RT)^(\Delta n)`

Where,

Kp is the pressure equilibrium constant

Kc is the molar equilibrium constant

R is gas constant , 0.082057 L atm.mol⁻¹K⁻¹

T is the temperature in Kelvins

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants)

For the first equilibrium reaction:

`2Na_((s))+2H_2O_((l))\rightleftharpoons 2NaOH_((aq))+2H_2_((g))`

Δn = (No. of moles of gaseous products)-(No. of moles of gaseous reactants) = (2+1)-(2+2) = -1