RQ 9 - 28 - 2009

# RQ 9 28 2009 - 14 s-1 The shortest wavelength 4 Which of the following has the highest frequency a = 890 nm b = 1220 nm c = 361 nm d = 237 nm 5

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RQ 9 – 28 – 2009 1. Octane (C 8 H 18 ) undergoes combustion according to the thermochemical equation: 2 C 8 H 18 (l) + 25 O 2 (g) 16 CO 2 (g) + 18 H 2 O(l) What is the enthalpy of combustion per mole of octane if the standard enthalpies of formation are: CO 2 (g) = –394 kJ/mol, H 2 O ( ) = - 286 kJ/mol and C 8 H 18 = - 210 kJ/mol. 2. What is the wavelength of an x-ray in nm, if its frequency is 1.20 x 10 18 s -1 ? 3. Which of the following has the longest wavelength? a. ν = 2.41 x 10 7 s - 1 b. ν = 1.78 x 10 5 s - 1 c. ν = 3.89 x 10

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Unformatted text preview: 14 s-1 The shortest wavelength? 4. Which of the following has the highest frequency? a. = 890 nm b. = 1220 nm c. = 361 nm d. = 237 nm 5. Write the equation that relates energy and frequency. 6. If a photon has more energy than is needed to eject an electron from a metal, where does the extra energy &amp;quot;go&amp;quot;? 7. What is the energy of a photon of wavelength 240 nm? 8. What is the energy of a mole of photons of wavelength 240 nm?...
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## This note was uploaded on 09/30/2009 for the course CHEM 210 taught by Professor Paukstelis during the Spring '09 term at Kansas State University.

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RQ 9 28 2009 - 14 s-1 The shortest wavelength 4 Which of the following has the highest frequency a = 890 nm b = 1220 nm c = 361 nm d = 237 nm 5

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