# Problem: The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process, 2 Cu2O(s) + O2(g) → 4 CuO (s). The change in enthalpy upon reaction of 67.68 g of Cu2O(s) is -69.06 kJ.Calculate the work, w, and the energy change, ΔUrxn, when 67.68 g of Cu2O (s) is oxidized at constant pressure of 1.00 bar and a constant temperature of 25 degree Celcius?

###### FREE Expert Solution

Given reaction: 2 Cu2O(s) + O2(g) → 4 CuO(s)

Given: mass of Cu2O(s) = 67.68 g Cu2O(s)

ΔHrxn = – 69.06 kJ

Calculating the mass of O2(g) that reacts with Cu2O(s):

= 0.2365 mol O2

93% (453 ratings) ###### Problem Details

The oxidation of copper(I) oxide, Cu2O(s), to copper(II) oxide, CuO(s), is an exothermic process, 2 Cu2O(s) + O2(g) → 4 CuO (s). The change in enthalpy upon reaction of 67.68 g of Cu2O(s) is -69.06 kJ.

Calculate the work, w, and the energy change, ΔUrxn, when 67.68 g of Cu2O (s) is oxidized at constant pressure of 1.00 bar and a constant temperature of 25 degree Celcius?