Thermodynamics of equilibrium: van't Hoff equation

27 questions on Thermodynamics of equilibrium: van't Hoff equation from the Chemical Equilibrium chapter: 5 NEET level, 11 JEE Main, 11 JEE Advanced. Each one opens with its answer and solution.

• For an endothermic reaction, what happens to the equilibrium constant when the temperature is raised? NEET level
• For a reaction at temperature T, the standard Gibbs energy change is Delta G deg = 0. The equilibrium constant at that temperature is NEET level
• Which relation correctly connects the standard Gibbs energy change and the equilibrium constant? NEET level
• Use R = 8.314 J mol^-1 K^-1 and ln 10 = 2.303. For a reaction with K = 1.0 x 10^3 at 298 K, Delta G deg is closest to NEET level
• A plot of ln K against 1/T for a reaction is a straight line. Its slope is NEET level
• Take R = 8.314 J mol^-1 K^-1. A reaction has K = 2.0 x 10^4 at 300 K. The standard Gibbs energy change at 300 K is JEE Main level
• Take R = 8.314 J mol^-1 K^-1. A reaction has Delta G deg = -17.0 kJ mol^-1 at 298 K. Its equilibrium constant is closest to JEE Main level
• Take R = 8.314 J mol^-1 K^-1 and assume Delta H deg = +50.0 kJ mol^-1 is constant. By what factor does K change when the temperature is raised from 300 K to 320... JEE Main level
• Take R = 8.314 J mol^-1 K^-1. The equilibrium constant of a reaction is 6.0 at 400 K and 2.4 at 500 K. Assuming Delta H deg is constant, its value is closest to JEE Main level
• Take R = 8.314 J mol^-1 K^-1. For a gas-phase reaction at 400 K, K = 50. The reaction quotient of a mixture is Q = 5.0. The Gibbs energy change Delta G of the m... JEE Main level
• Take R = 8.314 J mol^-1 K^-1. A reaction has K = 1.5 x 10^-3 at 400 K and K = 4.8 x 10^-2 at 450 K. Assuming Delta H deg is independent of temperature, calculat... JEE Main level
• Take R = 8.314 J mol^-1 K^-1. For a reaction, K = 0.25 at 350 K and Delta H deg = +40.0 kJ mol^-1 (constant). Calculate K at 400 K (two decimals). JEE Main level
• Take R = 8.314 J mol^-1 K^-1. A reaction has K = 5.0 x 10^-3 at 350 K. Calculate Delta G deg in kJ mol^-1 (one decimal). JEE Main level
• For the decomposition of a carbonate, Delta H deg = +178.0 kJ mol^-1 and Delta S deg = +165 J mol^-1 K^-1, both assumed independent of temperature. At what temp... JEE Main level
• The reaction 2SO2(g) + O2(g) <=> 2SO3(g) has Delta H deg = -198 kJ per mole of reaction. Which statements are correct? JEE Main level
• Take R = 8.314 J mol^-1 K^-1. A reaction has Delta G deg = +9.0 kJ mol^-1 at 300 K. Which statements are correct? JEE Main level
• Take R = 8.314 J mol^-1 K^-1. A reaction has Delta H deg = -92.0 kJ mol^-1 and Delta S deg = -199 J mol^-1 K^-1, both assumed independent of temperature. The va... JEE Advanced level
• The equilibrium constant of an endothermic reaction is 2.0 at 400 K and 8.0 at 500 K. Assuming Delta H deg is constant, the value of K at 450 K is closest to JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1 and T = 298 K. The standard Gibbs energies of formation are Delta_f G deg(NO2) = 51.3 and Delta_f G deg(N2O4) = 97.8 kJ mol^-1. For... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. For N2O4(g) <=> 2NO2(g) take Delta H deg = +57.0 kJ mol^-1 and Delta S deg = +176 J mol^-1 K^-1, independent of temperature. At wh... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. The equilibrium constant of a reaction is 0.25 at 350 K and 1.8 at 400 K. Assuming Delta H deg and Delta S deg are constant, calcu... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. An exothermic reaction has Delta H deg = -92.0 kJ mol^-1 (constant). Its equilibrium constant at 450 K is K_1. At what temperature... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. For a decomposition reaction Delta H deg = +178 kJ mol^-1 and Delta S deg = +161 J mol^-1 K^-1, both constant. Which statements ar... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. A reaction has the following equilibrium constants: K = 1.67 x 10^5 at 300 K, K = 409 at 400 K and K = 11.1 at 500 K. Assume Delta... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. A gas-phase reaction has K = 20 at 500 K. Which statements are correct? JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. At 300 K, reaction 1 has Delta G_1 deg = +30.0 kJ mol^-1 and reaction 2 has Delta G_2 deg = -50.0 kJ mol^-1. They are added to giv... JEE Advanced level
• Take R = 8.314 J mol^-1 K^-1. Which of the following statements about the temperature dependence of equilibrium constants are correct? JEE Advanced level