Textbook Question 4D.3

[Joseph Dekel 1F]

For Textbook question 4D.3, in the solution they find the q(reaction) and it has the units of kJ, but then there is another step that divides that number by moles of CO to get a value for q in kJ.mol^-1. How can you have different units for q? Also, the question asks for 1 mol of CO and the value that is obtained from 1.4g and CO molar weight gives a different number of moles so how does that answer the question? Thank you.

[Bianca Colavin 3B]

-2.058 kJ is the value of qreaction. The questions asks you to find the change in internal energy, deltaU, which has units of kJ/mol so you use the qreaction and divide it by the number of moles from the grams provided to find the deltaU.