The reaction 2SO2(g) + O2(g) 2SO3(g) has Delta H deg = -198 kJ per mole of reaction. Which statements are correct?

K decreases as the temperature is raised

A plot of ln K against 1/T has a positive slope

At fixed temperature K does not depend on the total pressure

K decreases as the temperature is raised

A plot of ln K against 1/T has a positive slope

A catalyst increases the value of K at a given temperature

At fixed temperature K does not depend on the total pressure

JEE Main levelOne or more correct optionsDifficulty 2 of 3ce142

The reaction $2 SO X_{2} (g) + O X_{2} (g) 2 SO X_{3} (g)$ has $Δ H^{\circ} = - 198 kJ$ per mole of reaction. Which statements are correct?

For an exothermic reaction

d ln K / d T = Δ H^{\circ} / R T^{2} < 0

, so

K

falls on heating. The slope of

ln K

versus

1/ T

- Δ H^{\circ} / R > 0

. A catalyst changes only the rate and not

K

. The equilibrium constant depends on temperature alone, not on total pressure.