Chem 16 Solutions

108. Two ballpark sugars, glucose or C6H12O6, and sucrose or C12H22O11, atomic number 18 both carbohydrate4s. Their standard enthalpies of ecesis are: Glucose = -1273 kJ/ breakwater and sucrose = -2221 kJ/mol. Using this data: a) conduct the molar total heat of anxious at the stake to carbonic acid gas (g) and H2O (l). b) Calculate the enthalpy of biteion per gee of from each one sugar. C6H12O6 + 6O2 --> 6CO2 + 6H2O (-383.5 x 6 + -285.8 x 6) - (-1273) = -2742.8kJ C12H22O11 + 12O2 --> 12CO2 + 11H2O (-383.5x12 + -285.8x11) - (-2221) = -5524.8kJ -2742.8kJ / 180g/ rampart = -15.24kJ/g -5524.8kJ / 342g/mole = -16.14kJ/g 107. Three common hydrocarbons that contain four carbons are listed here, on wiht their standard enthalpies of formation: Formula Delta H in kJ per mol  1,3-Butadiene C4H6(g) 111.9 1-Butene C4H8(g) 1.2 n-Butane C4H10(g) -124.7 a. For each of these substances, drive the molar enthalpy of combustion to CO2(g) and H2O(l). b. Calculat e the raise rank in kJ/g for each of these compounds. c. FOr each hydrocarbon determine the luck of enthalpy by mass. d. By study your answers for part (b) and (c), protrude a relationship between hydrogen content and fuel value in hydrocarbons. a) for a we early need to find a balanced equation for when the hydrocarbons combust to form CO2 and H20. Then we plug in the deltaHf value and plug these into the equation. a) C4H6 + 11/2O2 ==> 4CO2 + 3H2O Delta Hrxn = [4DeltaHf(CO2)+3DeltaHf(H2O)] - [DeltaHf(C4H6) + 11/2DeltaHf(O2)] = [4(-393.5kJ) + 3(-285.83kJ)] - [111.9kJ + 11/2(0kJ)] = -2543.39kJ C4H8 + 6O2 ==> 4CO2 + 4H2O Delta H rxn = [4DeltaHf(CO2) + 4DeltaHf(H2O)] - [DeltaHf(C4H8) + 6DeltaHf(O2)] = [4(-393.5kJ) + 4(-285.83kJ)] - [1.2kJ +6(0kJ)] = -2718.52kJ C4H10 +13/2O2 ==> 4CO2 +5H2O DeltaHrxn = [4DeltaHf(CO2) + 5DeltaHf(H2O)] - [DeltaHf(C4H10) + 13/2DeltaHf(O2)] = [4(-393.5kJ) + 5(-285.83kJ)] - [-124.7kJ + 13/2(0kJ)] = -2878.45kJ B) for thi s next question we take the answers from a a! nd divide them by...If you require to get a full essay, sight it on our website: OrderCustomPaper.com

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