solution3_pdf - Version 062/AADDC Quiz 6 Enthalpy...

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Version 062/AADDC – Quiz 6 Enthalpy – lyon – (51215) 1 This print-out should have 10 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. 001 10.0 points Consider the following substances: HCl(g) F 2 (g) HCl(aq) Na(s) Which response includes ALL of the sub- stances listed where Δ H 0 f is NOT equal to zero? 1. HCl(g) and HCl(aq) correct 2. Na(s) and F 2 (g) 3. HCl(g), Na(s) and F 2 (g) 4. HCl(g), Na(s), HCl(aq) and F 2 (g) 5. Na(s) Explanation: Δ H 0 f = 0 for elements in their standard states. This would be true for both Na(s) and F 2 (g). 002 10.0 points Consider the data in the table below. If the same amount of heat is added to the same size sample of each of the substances in the table, which would experience the highest change in temperature? Substance Specific Heat (J/g · K) H 2 O( ) 4 . 184 Hg( ) 0 . 138 C 6 H 6 ( ) 1 . 74 Al(s) 0 . 903 1. H 2 O ( ) 2. Al (s) 3. C 6 H 6 ( ) 4. Hg ( ) correct Explanation: The specific capacity is defined as the amount of heat required to raise the tempera- ture of one gram of a substance by one degree Celsius or Kelvin. From the table we can see that Hg, the substance that has the lowest specific heat capacity, will have the highest change in temperature. 003 10.0 points Which of the following reactions corresponds to the value of the heat of formation for the product molecule as found in the tables?
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