Multiple choice question on what affects the value of the rate constant.

Which of the following may affect the value of the rate constant? a. catalysts b. concentrations of reactants c. temperature d. answers b and c e. answers a, b, and c

Rate Constant

For a certain reaction, the activation energy is 52.1 kJ/mole. By what ratio will the rate constant change if the temperature is decreased from 175 degrees celsius to 75 degrees celsius? a. 0.00402 b. 0.0179 c. 0.996 d. 121 e. 249

Multiple choice question about how a temperature increase affects the rate of a chemical reaction.

As the temperature increases, the rate of chemical reaction a. increases only in the forward direction b. increases in both the forward and reverse directions c. increases due to a lowering of the activation barrier d. is not effected e. decreases for endothermic reactions

dynamic equilibrium

Which of the following statement is true for dynamic equilibrium? a. The concentrations of reactants and products are equal b. the forward and reverse reactions occur at the same rate c. the concentrations of reactants and products remain constant over time d. answers a and b are correct e. answers b and c are correct

equilibrium constant

The equilibrium constant for a gas phase reaction is measured at two temperatures. At 100 degrees celsius, the equilibrium constant is 36. At 200 degrees celsius, the equilibrium constant is 147. Which of the following statements is correct for this equilibrium? a. the reaction is first order b. the reaction is endothermic c. the reaction is exothermic d. each reactant molecule decomposes into two or more product molecules e. both c and d are correct