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Chap 13 practice problems

Chap 13 practice problems - EXAM PRACTICE QUESTIONS Chapter...

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EXAM PRACTICE QUESTIONS Chapter 13 1. A chemical reaction releases 58.5 kJ into 150. g of water. Assuming no heat is lost to the surroundings, what is the temperature increase of the water? The specific heat of water is 4.18 J/g ° C. 2. Arrange the following substances in order of increasing boiling point. Ne, NaClO 3 , H 2 O, H 2 Se ______ < ______ < ______ < ______ 3. Consider the following compounds. CH 3 NH 2 , CH 4 , C 2 H 6 , SiH 4 , H 2 S a) Which compound would have the highest molar heat of vaporization? ____________________ b) Which compound(s) would exhibit London forces? ____________________ c) Which compound(s) is the predominant intermolecular force dipole-dipole interactions? ____________________ d) Which compound would boil at the lowest temperature? ____________________ e) Which compound(s) would exhibit hydrogen bonding? ____________________ 4. How much heat is released when 40.0 g of steam at 250 ° C cools and condenses to water at 30.0 ° C? Specific Heat of water is 4.18 J/g ° C, Specific Heat of steam is 2.03 J/g ° C, heat of vaporization of water is 2.260 kJ/g 5. What is the heat of fusion of chromium (in kJ/mol) if 10.0 grams of solid chromium absorbs 2.82 × 10 3 J of heat in melting at 2173 K, its melting point?
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