8. Thermochemistry
Constant-Volume Calorimetry
7PRACTICE PROBLEM
Given the following possible fuel substitutes
methanol (CH3OH): ΔH°c = -726.1 kJ/mol, density = 0.792 g/mL
ethanol (C2H5OH): ΔH°c = -1366.8 kJ/mol, density = 0.789 g/mL
acetylene (C2H2): ΔH°c = -1301.1 kJ/mol, density = 0.0011772 g/mL
isooctane (C8H18): ΔH°c = -5461 kJ/mol, density = 0.690 g/mL
Part A. Which fuel produces the most energy per unit mass?
Part B. Which fuel produces the most energy per unit volume?
Given the following possible fuel substitutes
methanol (CH3OH): ΔH°c = -726.1 kJ/mol, density = 0.792 g/mL
ethanol (C2H5OH): ΔH°c = -1366.8 kJ/mol, density = 0.789 g/mL
acetylene (C2H2): ΔH°c = -1301.1 kJ/mol, density = 0.0011772 g/mL
isooctane (C8H18): ΔH°c = -5461 kJ/mol, density = 0.690 g/mL
Part A. Which fuel produces the most energy per unit mass?
Part B. Which fuel produces the most energy per unit volume?