Why does a child in a wagon seem to fall backward when you give the wagon a sharp pull? If the acceleration of a body is zero, are no force acting on it? Why do you push harder on the pedals of a bicycle when first starting out than when moving with a constant speed? […]
1. A reaction by which ozone is destroyed in the stratosphere is O3(g) + O(g) ® 2 O2(g) The activation energy for ozone destruction is 17.1 kJ per mole of O3 consumed. Use standard enthalpies of formation from Table B of Appendix II to calculate the enthalpy change for this reaction. Is the reaction endothermic […]
1. The isomerization of methyl isonitrile (CH3NC) to acetonitrile (CH3CN) was studied in the gas phase at 215EC, and the following data were obtained. Time(s) [CH3NC](M) 0 0.0165 2000. 0.0110 5000. 0.00591 8000. 0.00314 Calculate the average rate of reaction, in M/s, for the time interval between each measurement. (1) First […]
1. Using standard reduction potentials (Table D in Appendix II), calculate the standard cell potential (EEcell) for each of the following reactions. Which of these reactions do you expect to occur spontaneously in the forward direction? (a) Cl2(g) + 2 I – (aq) ® 2 Cl – (aq) + I2(s) Reduction half-reaction: Cl2 + 2 […]