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Petroleum B Practice Quiz 3 Use the chart provided to answer these questions.

Petroleum B Practice Quiz 3 Use the chart provided to answer these questions. 1. Calculate the change in water temperature (  T = T f – T i ). 2. Calculate the mass of candle wax (m wax ) burned. 3. Calculate the mass of water (m H2O ) heated.

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Petroleum B Practice Quiz 3 Use the chart provided to answer these questions.

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  1. Petroleum B Practice Quiz 3Use the chart provided to answer these questions.

  2. 1. Calculate the change in water temperature ( T = Tf – Ti). 2. Calculate the mass of candle wax (mwax) burned.

  3. 3. Calculate the mass of water (mH2O) heated.

  4. 4. Calculate Heat (Q) gained by water in Joules & convert it to kJ. Q = mH2OCp  T Cp=4.18j/goC

  5. 5. Calculate the heat of combustion =Q/mwax.

  6. 6.Which is a better fuel, candle wax or butane, on a gram-to-gram comparison (see pg. 205 of book).

  7. 7. Which is a better fuel, butane or hexane, on a mole-to-mole comparison?

  8. Petroleum B Practice Quiz 3 Key1. 40.6 - 12.0 =28.6oC2. 23.96 – 23.40g= 0.56g3. 121.6g – 15.8g= 105.8g4. (105.8g)(4.18J/goC)(28.6oC)=12,648.18J5. 12.65kJ/ .56g= 22.586kJ/g 6. Butane is a better fuel gram-to-gram because its heat of combustion (kJ/mol) is 49.3 and candle wax is 22.59. 7. Hexane is a better fuel mole-to-mole because its molar heat of combustion (kJ/mol) is 4141 while butane is 2859.

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