Chemistry

Problem

The synthesis equilibrium

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

is exothermic with

\Delta H^\circ = -92\,\text{kJ}

. At

500\,\text{K}

K_c = 6.0 \times 10^{-3}

. A constant-volume vessel at

500\,\text{K}

contains an equilibrium mixture with

[NH_3] = 0.20\,\text{M}

[N_2] = 0.50\,\text{M}

, and

[H_2] = 1.50\,\text{M}

. The temperature is then raised to

550\,\text{K}

, at which

K_c = 1.1 \times 10^{-3}

. Determine the new equilibrium concentration of

NH_3

550\,\text{K}

. a. Determine the new equilibrium concentration of

NH_3

550\,\text{K}