Calculate the work expansion when 100 gram of water is electrolysed at a constant pressure of 1 ATM and temperature - Chemistry - States of Matter

Question

Calculate the work expansion when 100 gram of water is electrolysed
at a constant pressure of 1 ATM and temperature of 25 degree
Celsius

Yasodharan · Accepted Answer

Dear Student,

The reaction scheme is,

2H2O→O2+2H2moles of H2O=100 gm18 gmmol=5
55 molmoles of H2=5 55moles of O2=2
775 molWH2=-nRT=-5 55×8 3145×298=-13
75 kJWO2=-nRT=-2 775×8 3145×298=-6
876 kJWtotal=WH2+WO2=(-13 75)+(-6 876)=-20 626 kJ

Regards

Calculate the work expansion when 100 gram of water is electrolysed at a constant pressure of 1 ATM and temperature of 25 degree Celsius