Chemical Energetics?
The standard enthalpy change of combustion of propane (C3H8)
is -2220kJ/mol. It requires 1.0J of energy to raise the temperature of 1.0g of air by 1.0K.
Calculate what mass of propane needs to be burned to raise the temperature of the air in the balloon by 50K.
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To raise the temperature by 50K we need 50.0 J = 0.05 kJ
0.05 / 2220 = 0. 0000225 mole
MM propane = 44 g/mol
44 x 0.0000225 = 0.00099 g of propane