Chemistry

Problem

For the reaction

2\text{SO}_{2}(g)+\text{O}_{2}(g)\rightleftharpoons 2\text{SO}_{3}(g)

with

\Delta H=-196\,\text{kJ}

, which of the following changes would most strongly shift the equilibrium toward the formation of

\text{SO}_{3}

? a) Lowering the temperature from

600^{\circ}\text{C}

400^{\circ}\text{C}

1\,\text{atm}

b) Raising the temperature from

400^{\circ}\text{C}

600^{\circ}\text{C}

1\,\text{atm}

c) Reducing the pressure from

3\,\text{atm}

1\,\text{atm}

500^{\circ}\text{C}

d) Adding a platinum catalyst at

500^{\circ}\text{C}

and

1\,\text{atm}