Delta H Calculation:

To calculate delta H for the reaction, we need to use the equation:

ΔH = ΔHf(products) - ΔHf(reactants)

First, let's determine the moles of CuCl2.2H2O(s) and CuCl2.H2O(s) in the mixture:

Let x be the moles of CuCl2.2H2O(s) and y be the moles of CuCl2.H2O(s).

Since the ratio of CuCl2.2H2O(s) to CuCl2.H2O(s) is 1:1, we have:

0.005 atm / P(CuCl2.2H2O) = x / (x + y)

0.025 atm / P(CuCl2.H2O) = y / (x + y)

Solving these two equations simultaneously, we can find the values of x and y.

Now, let's look at the enthalpy of formation values:

ΔHf(CuCl2.2H2O(s)) = -177.5 kJ/mol
ΔHf(CuCl2.H2O(s)) = -139.8 kJ/mol

Using these values and the equation mentioned earlier, we can calculate delta H for the reaction.

Delta G and Delta S Calculation:

To calculate delta G and delta S at 25 degrees Celsius, we can use the equations:

ΔG = ΔH - TΔS

ΔS = (ΔSf(products) - ΔSf(reactants))

First, let's determine the moles of CuCl2.2H2O(s) and CuCl2.H2O(s) in the mixture using the same method as before.

Then, let's look at the entropy of formation values:

ΔSf(CuCl2.2H2O(s)) = 222.6 J/mol·K
ΔSf(CuCl2.H2O(s)) = 180.1 J/mol·K

Using these values and the equation mentioned earlier, we can calculate delta S for the reaction.

Once we have delta H and delta S at 25 degrees Celsius, we can substitute these values into the equation ΔG = ΔH - TΔS, where T is the temperature in Kelvin (25 degrees Celsius = 298 K), to calculate delta G.

Vapour Pressure of Water at 25 degrees Celsius:

The vapour pressure of water at a given temperature is the pressure exerted by water molecules in the gas phase in equilibrium with liquid water at the same temperature.

To determine the vapour pressure of water at 25 degrees Celsius, we can use the Antoine equation:

log(P) = A - (B / (T + C))

where P is the vapour pressure in mmHg, T is the temperature in degrees Celsius, and A, B, and C are constants specific to water.

By substituting T = 25 degrees Celsius into the equation and solving for log(P), we can find the logarithm of the vapour pressure of water. Taking the antilogarithm of this value will give us the vapour pressure of water at 25 degrees Celsius.

By following these steps, we can calculate delta H, delta G, and delta S for the reaction,