Chemistry F322 OCR question?
Two workers decide to car share on a 25 mile journeys to work and back. On this journey, each of their cars uses petrol equivalent to 2.0kg of heptane.
Calculate the amount, in mol of heptane C7H16 saved: I got 20 moles for this..
Calculate the energy saved : entahlpy change of combustion of C7H16 = -4817
the answer is 20 x -4817 but I don't understand why you multiply the moles by the tnahlpy change of combustion?
Calculate the amount, in mol of heptane C7H16 saved: I got 20 moles for this..
Calculate the energy saved : entahlpy change of combustion of C7H16 = -4817
the answer is 20 x -4817 but I don't understand why you multiply the moles by the tnahlpy change of combustion?
Original post by _Aqsxo
Two workers decide to car share on a 25 mile journeys to work and back. On this journey, each of their cars uses petrol equivalent to 2.0kg of heptane.
Calculate the amount, in mol of heptane C7H16 saved: I got 20 moles for this..
Calculate the energy saved : entahlpy change of combustion of C7H16 = -4817
the answer is 20 x -4817 but I don't understand why you multiply the moles by the tnahlpy change of combustion?
Calculate the amount, in mol of heptane C7H16 saved: I got 20 moles for this..
Calculate the energy saved : entahlpy change of combustion of C7H16 = -4817
the answer is 20 x -4817 but I don't understand why you multiply the moles by the tnahlpy change of combustion?
Think about the definition of enthalpy change of combustion
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