Reaction quotient Q vs K
Q < K · net forward →
Q = K
← net backward · Q > K
Reaction
N₂ + 3H₂
H₂ + I₂
N₂O₄
PCl₅
A + B
CaCO₃(s)
↺ Again
Temperature (sets K) · Kp unit
773 K
bar
atm
A + B ⇌ C + D · Kc at 298 K, ΔH°
4.00
−40 kJ
+40 kJ
Disturb the equilibrium (Le Chatelier)
+ add
− half
V ÷ 2
V × 2
+ Ar, fixed V
+ Ar, fixed P
+50 K
−50 K
Catalyst
Classic problems · prediction mode
Predict first (P)
ICE table