Consider the reaction for the formation of H2O(g) from its elements. Use the data in Appendix C

Question:

Consider the reaction for the formation of H2O(g) from its elements. Use the data in Appendix C to answer the following questions.
a. What is the standard enthalpy of formation of H2O(g) at 25oC?
b. What is the standard entropy of formation of H2O(g) at 25oC?
c. Use these values to calculate the standard free energy of formation of H2O(g) at 25oC. Check this value against the one given in Appendix C.
d. A student obtained ∆Gfo for H2O(g) by calculating ∆Hfo ∆TSo, using ∆Hfo and ∆So for H2O(g) from Appendix C. Is this correct? Explain.