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Chemistry Forums for Students => Undergraduate General Chemistry Forum => Topic started by: Win,odd Dhamnekar on November 28, 2020, 06:37:53 AM

Title: Effectoftemperature on the [itex]2NO_2\rightleftharpoons N_2O_4[/itex]equilibria
Post by: Win,odd Dhamnekar on November 28, 2020, 06:37:53 AM

Hello,
   In the File attached ' 2NO₂ ::equil:: N₂O₄, last table shows K_p or K_c?

My answer it is K_c because K_p=K_c*RT^Δn where R= universal gas constant, T=temperature, Δn= change in number of moles. Isn't it?

Title: Re: Effectoftemperature on the [itex]2NO_2\rightleftharpoons N_2O_4[/itex]equilibria
Post by: mjc123 on November 29, 2020, 06:56:24 AM

They tell you it's K_p. Admittedly textbooks sometimes have misprints, but why do you think it might not be K_p?

(Also, you can tell it's K_p because K = e^-ΔG°/RT. Why would this not be the case for K_c?)