For the reaction2Co3+(aq)+2Cl−(aq)→2Co2+(aq )+Cl2(g). E∘=0.483 Vwhat is the cell potential at 25 ∘C if the concentrations are [Co3+]= 0.489 M , [Co2+]= 5.10×10−2 M , and [Cl−]= 0.691 M , and the pressure of Cl2 is PCl2= 5.50 atm ?Express your answer with the appropriate units.

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :

i think it is true since you can test the answer and can use observations to complete it.

6.4 cm (max) - 25 cm (min)