1. 2.50 × 102 ml of 1.00 M HCl reacts with 4.00 x 102 of 0.5 M NaOH in a constant pressure calorimeter with negligible (virtually zero) heat capacity. The enthalpy of reaction for the process H+1(aq) + OH-1(aq) &rarr H2O(l) is -56.2 kJ/mol. What is the final temperature of the solution, if the initial temperature was 22.4 ºC?
2. 41.3 g of unknown metal at 76 ºC is placed in a constant pressure calorimeter that contains 100.0 g of water at 23.1 ºC. The calorimeter is at the same temperature as the water. The heat capacity of the calorimeter itself is 15.77 J/ºC, and the specific heat of the water is 4.186 J/g ºC. The final temperature of the system is 29.4 ºC. What is the heat capacity of the metal?
3. Find the enthalphy of formation for CO2, using the fact that C (graphite) + O2 &rarr CO2, and the enthalpy of the reaction is -393.5 kJ/mol.
4. Find the energy of a photon of wavelength 567 nm, and its momentum.
5. What is the de Broglie wavelength of a American football weighing 400 g with velocity 40 m/s ?
6. What is the de Broglie wavelength of an electron (mass = 9.109 × 10-28 g), with velocity 1.0 × 108 m/s?
7. What are ALL the quantum numbers for the following orbitals: (a) 3p, (b) 4f, (c) 2d, (d) 2p.
8. Draw an energy diagram for the hydrogen atom, including all orbitals up to the n=6 level. Then draw an energy diagram for a NON-hydrogen atom, again up to the n=6 level.
9. Write the equation for the (first) ionization of F. Which element has the largest first ionization energy, and why?
10. Find the energy of a photon emitted from a hydrogen atom when an electron falls from the n=5 level to the n=1 level.
11. Give examples of acidic, amphoteric, and basic oxides.
12. Write the equations to define ionization energy and electron affinity.
© 2005 by Lawrence T. Sein. All rights reserved.
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