The enthalpy change for the reaction between 2 molecules of carbon oxysulfide (COS) to form 1 molecule of CO2 and 1 molecule of CS2 is –3.2 × 10–24 kJ per molecule of COS. What is the enthalpy change for 1 mole of COS?

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Answer 1 · 2017-10-24T22:22:22

#DeltaH = (-1.9kJ)/(mol)#

Make use of Avogadro's number to relate a mole of molecules, like so:

#(-3.2*10^-24kJ)/(mol e cu l e)* (6.023*10^23)/(mol) approx (-1.9kJ)/(mol)#