# Answer to Question #43068 in Physical Chemistry for Zeph

Question #43068

if the fuel consumption of a car, traveling at steady 60 mph, is 20 mpg what is the power produced by the petrol being burnt in the engine? Assume that the density of petrol is 0.84kg/l and the heat of combustion of petrol is 47 302kj/kg

Expert's answer

Calculate how many gallons of fuel burned in the engine per 1 hour or 60 m:

60/20 = 3

Transform gallons into liters:

3 x 3.785=11.356 l

Mass of fuel is:

0.84 x 11.356 =9.539 kg

Energy that produced in the engine per 1 hour:

9.539*47302=

60/20 = 3

Transform gallons into liters:

3 x 3.785=11.356 l

Mass of fuel is:

0.84 x 11.356 =9.539 kg

Energy that produced in the engine per 1 hour:

9.539*47302=

**451.214 MJ / hour**Need a fast expert's response?

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