ith the given data: Initial temperature = 30oC; Final temperature = 50oC Initial volume of water = 100 mL; Final volume of water = 100 mL Initial volume of isopropyl alcohol = 200 mL; Final volume of isopropyl alcohol = 195 mL Density of water = 1.00 g/mL specific heat of water = 4.18 J/goC Relative density of 70% isopropyl alcohol is 0.79   a.) Find the mass of the fuel burnt (mfuel) b.) The amount of moles of the fuel burnt, (nfuel) c.) molar enthalpy of combustion of the fuel by using the equation: ΔcH=(q/nfuel)(1kJ/1000J) d.) Would there be a change in the value of enthalpy of combustion if the water is heated until a 30oC change is observed, rather than 20oC? Why or why not?

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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With the given data:
Initial temperature = 30oC; Final temperature = 50oC

Initial volume of water = 100 mL; Final volume of water = 100 mL

Initial volume of isopropyl alcohol = 200 mL; Final volume of isopropyl alcohol = 195 mL

Density of water = 1.00 g/mL

specific heat of water = 4.18 J/goC

Relative density of 70% isopropyl alcohol is 0.79

 

a.) Find the mass of the fuel burnt (mfuel)

b.) The amount of moles of the fuel burnt, (nfuel)

c.) molar enthalpy of combustion of the fuel by using the equation:

ΔcH=(q/nfuel)(1kJ/1000J)

d.) Would there be a change in the value of enthalpy of combustion if the water is heated until a 30oC change is observed, rather than 20oC? Why or why not?

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