JEE Chemistry
JEEChemistryEquilibriumClass 11

What is the difference between K_c and K_p?

K_c uses molar concentrations; K_p uses partial pressures — they're related by K_p = K_c(RT)^Δn for gases.

K_c uses molar concentrations; K_p uses partial pressures — they're related by K_p = K_c(RT)^Δn for gases. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.

Key point

K_c vs K_p

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