Chapter 5 Review

# Substance h o f kjmol c 2 h 4 g 523 c 2 h 5 ohl 2777

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27. Substance H o f (kJ/mol) C 2 H 4 (g) 52.3 C 2 H 5 OH(l) -277.7 CH 3 CO 2 H(l) -484.5 H 2 O(l) -285.8 The value of é H ø for the following reaction is -137.0 kJ. What is the value of H o f (in kJ/mol) for C 2 H 6 (g)? C 2 H 4 (g) + H 2 (g) C 2 H 6 (g) a. 189.3 b. -84.7 c. -189.3 d. 84.7 e. More information is needed. 28. Substance H o f (kJ/mol) Ag 2 O(s) -31.0 Ag 2 S(s) -32.6 H 2 S(g) -20.6 H 2 O(l) -286 Determine the value of H o (in kJ) for the reaction: 2Ag 2 S(s) + O 2 (g) 2Ag 2 O(s) + 2S(s) Answer the following questions from chapter 10- gas laws. 29. Of the following, _____ is characteristic of gases. 30. In a Torricelli barometer, one atmosphere pressure supports a 760 mm column of mercury. If the original tube containing the mercury is replaced with a tube having twice the diameter of the original, what will the height of the mercury column be at one atmosphere pressure? 31. The first person to investigate the relationship between the pressure of a gas and its volume was _____. a. Amadeo Avogadro b. Lord Kelvin c. Jacques Charles d. Robert Boyle e. Joseph Louis Gay-Lussac

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32. Of the following, _____ is a correct statement of Boyle's law. 33. The volume of an ideal gas is zero at _____.
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