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
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
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 ar ...continues
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 endother ...continues
For which of the following reactions does Kc equal Kp? a. C2H4(g)+H2(g) (equilibrium sign) C2H6(g) b. H2(g)+l2(s) (equilibrium sign) 2Hl(g) c. 2S(s)+3O2(g) (equilibrium sign) 2SO3(g) d. SO2(g)+NO2(g) (equilibrium sign) SO3(g)+NO(g) e. both answers b and d
For the reaction below, the partial pressures of gases at equilibrium are as follows: H2=7.1x10(exponent negative 5)atm, Cl2=2.5x10(exponent negative 6)atm, and HCl=3.0atm. What is the value of the equilibrium constant Kp? H2(g)+Cl2(g) (equilibrium sign) 2HCl(g)
Nitrosyl chloride decomposes according to this reaction: 2NOCl(g) (equilibrium sign) 2NO(g)+Cl2(g) 0.600 atm of nitrosyl chloride is sealed in a flask and alowed to reach equilibrium. If 27% of the NOCl decomposes, what is the equlibrium constant for the reaction? a. 0.00485 b. 0.781 c. 0.0300 d. 0.370 e. ...continues
Multiple choice question about the equilibrium partial pressure of a gas.
For the system CO(g)+H2O(g) <--> CO2(g)+H2(g) Kp is 1.6 at 900K. If 0.500 atm CO(g) and 0.500 atm H2O(g) are combined in a sealed flask, what is the equilibrium partial pressure of CO2(g)? a. 0.279 atm b. 0.308 atm c. 0.471 atm d. 0.608 atm e. 0.942 atm
Which of the following statement is true? a. Increasing the temperature of the reaction will always result in higher product yields b. catalysts shift the equilibrium constant in favor of the products c. Kc and kp are the same for gas phase reactions d. Increasing the volume of a system(at constant temperature) w ...continues
