ma Jeff's review questions

# ma Jeff's review questions - What are the equations that go...

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A small Pizza Hut pizza is analyzed in a bomb calorimeter designed to test foods. The pizza weighs 250g. The sample compartment where the pizza is housed is bathed in 20-L of water. If the caloric content of the pizza is 410 Calories, how much will the temperature of the water raise after the combustion? Turn 410 Cal = 410kcal into Joules Use q=mc(delta T) to solove Answer: Delta T = 20.5 The equilibrium constant for a reaction is .48 at 25 degrees C. What is the value of deltaG(not) in KJ/mol at this temperature? DeltaG(not) = -RTLnK Answer: 1.8 KJ/mol What are the 3 laws of thermodynamics?

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Unformatted text preview: What are the equations that go with them? 1. Energy is conserved deltaE=q+w 2. The entropy of the universe is always increasing deltaS(uni)=deltaS(syst)+deltaS(surr) > 0 3. The entropy of a pure crystalline solid at absolute zero is zero. S=kLnw A solution of NaF is added drop wise to a solution that is .0144 M Ba2+. When the concentration of F- exceeds ____________ M, BaF2 will precipitate. Neglect volume changes, for BaF2 Ksp=1.7E-6 Write Ksp expression Plug in known values, solve for [F-] Answer: 1.1E-2 M...
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## This note was uploaded on 04/07/2011 for the course CHEM 106 taught by Professor Herron,s during the Winter '08 term at BYU.

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