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SAT® Subject Test in Chemistry

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Analyzing $K_p$ Values

SATCHM-NTIEYB

Which reaction has the smallest equilibrium constant$(K_p)$?

A

$N_2(g) + 3H_2(g) \rightleftharpoons 2 NH_3(g)$

When: $N_2=1atm, H_2=2atm, NH_3=4atm$

B

$I_2(g) + H_2(g) \rightleftharpoons 2HI(g)$

When: $I_2=2atm, H_2=2atm, HI=2atm$

C

$PCl_3(g) + Cl_2(g) \rightleftharpoons PCl_5(g)$

When: $PCl_3=3atm, Cl_2=4at, PCl_5=1atm$

D

$2SO_2+ O_2 \rightleftharpoons 2SO_3$

When: $SO_2=2atm, O_2=2atm, SO_3=3atm$

E

$N_2O_4 \rightleftharpoons 2NO_2$

When: $N_2O_4=4atm, NO_2=4atm$