[aisha]

Hi All,

So the task is to calculate amongst other things, the Storage Density and the Energy Density of the Ethanol fuell cell.

I have calculated the Storage Density: Capacity/Weight of EtOH = 2.5 x 10^7 C Kg^-1

Which I think is ok. Now, I have been told that to calculate the Energy Density we use: Voltage x Storage density. So i get the answer 6.3 x 10^7 V C kg^-1...but the units they want is watt hours per kilogram (W h kg-1)- and here lies the problem. Can anyone tell me how to convert???

Thanks All

[Rabn]

what are the units of the Watt?

[aisha]

watt = J s^-1