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Exam 4-1.6 - E all of these have zero or negative values...

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Sample Exam 4-1 Dr. V. Williamson © Vickie M. Williamson 2007, All Rights Reserved 20. Substance | ! H f o (kJ/mol) ____________________________________________ IF(g) -95 IF5(g) -840 IF7(g) -941 What is the value of Δ H° for the following reaction? IF 5 (g) + F 2 (g) IF 7 (g) A. 1801 kJ B. -1801 kJ C. 101 kJ D. -101 kJ E. more data is needed 21. Which equation represents a reaction that has a positive value for work? A. B. C. D. E. all of these have zero or negative values for work.
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Unformatted text preview: E. all of these have zero or negative values for work. 22. Given the reaction: C(g) + H 2 (g) + F 2 (g) ---> CH 2 F 2 (g) What is the heat of reaction, Δ H, in kJ at 25 °C? Bond Energies (kJ/mol) at 25 °C C—H 414 C—F 486 H—H 435 F—F 159 H—F 569 A. +2394 kJ B. -306 kJ C. -1206 kJ D. -1800 kJ E. a positive value not given CaCO 3 (s) CaO(s) + CO 2 (g) 2C(s) + O 2 (g) 2CO(g) 2Na(s) + 2H 2 O(l) 2NaHO(aq) + H 2 (g) 2H 2 (g) + O 2 (g) 2H 2 O(l)...
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