Apthermoprac2 - AP Chemistry Thermochemistry 2...

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AP Chemistry Thermochemistry 2 apthermoprac2.doc Name: _______________________________ Date: _______________ Period: ____ 1. For the hypothetical reaction 3X 2(g) → 2X 3(g) , Δ H o is -333kJ (the atomic weight of X is 66.6amu). Determine Δ H of the conversion of 11.1g of X 3 gas into X 2 gas in kilojoules. Answer: _______________________ 2. Given 2Na 2 O 2(s) + 2H 2 O (l) → 4NaOH (s) + O 2(g) Δ H o = -126kJ Calculate the amount of heat that is evolved (in kJ) from the reaction of 25.0g of Na 2 O 2 with water. Answer: _______________________ 3. If the molar heat capacity of a compound with the formula C 2 H 6 SO is 88.0J/molK, what is the specific heat (in J/gK) of this substance? Answer: ______________________ 4. A sample of aluminum (0.90J/gK) absorbs 9.86J of energy while being heated from 23.2 o C to 30.5 o C. Determine the mass of the sample. Answer: _______________________ 5. An iron sphere of diameter 4.00cm and density 7.86g/cm 3 at 20.0 o C is dropped into a perfectly insulated beaker containing 90.0g of
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This note was uploaded on 12/07/2011 for the course CHEM 100 taught by Professor Feebeck during the Fall '10 term at Purdue University-West Lafayette.

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Apthermoprac2 - AP Chemistry Thermochemistry 2...

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