# Chemistry helpppp

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Thread starter 6 months ago
#1
Does anybody know how to convert from kJmol^-1 to Watts of a species.

kJmol^-1 = 472
moles = 2.5 x 10^-9 of oxygen

the answer is 1.125 x 10^-3

I really don't know how that is the answer
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6 months ago
#2
(Original post by n2697)
Does anybody know how to convert from kJmol^-1 to Watts of a species.

kJmol^-1 = 472
moles = 2.5 x 10^-9 of oxygen

the answer is 1.125 x 10^-3

I really don't know how that is the answer
A Watt is a Joule per second (Js-1). It is a unit of power. Take screen shot of the whole question?
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Thread starter 6 months ago
#3
I've attached the question with the answer
0
6 months ago
#4
(Original post by n2697)
I've attached the question with the answer
work out the delta G for the reaction using DG=-EcellzF

Work out how much energy recieved by the solar cell per second

You know the volume of oxygen produced per second

Work out how efficiently the energy is used from that.

Don't forget Power=energy/sec i.e. watts=joules/sec

see attachment for details
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Thread starter 6 months ago
#5
Hi, just saw the email notification for this. Thank you so much for taking the time to help me, it's much appreciated!
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