[chilli]

hello all!
I was given this question:
the energy needed to make 1 Cs⁺ ion is 3.89eV, what is the energy amount needed (in Joules) in order to get 2.5 moles of Cs ions

this is how I solved it but it doesn't feel right maybe I missed something in class, what is wrong with my solution?

 2.5 mole Cs+ = 1.505x10^24ions

 3.89eV x 1.60x10^-19 = 6.224x10^-19J

 6.224x10^-19J x 1.505x10^24= 936712J

I appreciate any help

 

[Borek]

Haven't checked numbers but the logic looks correct.

[chilli]

really? can joule results often come in such large numbers? (excuse my silly questions I don't have the feel for this scale yet, is it something you get later?)

[Borek]

Hundreds of kJ per mole is a quite common number when it comes to chemical reaction energetics.

[chilli]

ty very much!