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Chap 13 practice problems answers

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

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EXAM PRACTICE QUESTIONS ANSWERS 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. C 93.3 C) J/g (4.18 g 150 J 58,500 gC Q T = = = 2. Arrange the following substances in order of increasing boiling point. Ne < H 2 Se < H 2 O < NaClO 3 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? CH 3 NH 2 b) Which compound(s) would exhibit London forces? CH 4 , C 2 H 6 , SiH 4 c) Which compound(s) is the predominant intermolecular force dipole-dipole interactions? H 2 S d) Which compound would boil at the lowest temperature? CH 4 e) Which compound(s) would exhibit hydrogen bonding? CH 3 NH 2 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 J = 40.0 g (2.03 J/g
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