At a festival, spherical balloons with a radius of 150.cm are to be inflated with hot air and released. The air at the festival will have a temperature of 25C and must be heated to 100C to make the balloons float. 2.00 kg of propane (C3H8) fuel are available to be burned to heat the air. Calculate the maximum number of balloons that can be inflated with hot air.

Here are some data you may find useful:

Specific heat capacity of air:	1.009 J/gC
Density of air at 100C:	0.946 kg/m3
Density of propane at 100C:	1.440 kg/m3
Formation enthalpy of propane at 25C:	103.8 kJ/mol

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= balloons