A)Write a balanced chemical equation depicting the formation of one mole of CaCO
ID: 898042 • Letter: A
Question
A)Write a balanced chemical equation depicting the formation of one mole of CaCO3(s) from its elements in their standard states.
B)For CaCO3(s), find the value of Hf. (Use Appendix C in the textbook).
C)Write a balanced chemical equation depicting the formation of one mole of POCl3(l) from its elements in their standard states.
D)For POCl3(l), find the value of Hf. (Use Appendix C in the textbook).
E)Write a balanced chemical equation depicting the formation of one mole of C2H5OH(l) from its elements in their standard states.
F)For C2H5OH(l), find the value of Hf. (Use Appendix C in the textbook).
Explanation / Answer
A) Balanced equation,
Ca(s) + C(s) + 3/2O2(g) ---> CaCO3(s)
B) delat Hof = -1206.9 - (0) = -1206.9 kJ/mol
The standard delta H(formation) for CaCO3 is -1206.9 kJ/mol
C) 1/2P2(s) + 1/2O(g) + 3/2Cl2(g) ---> POCl3(l)
D) delat Hof = (-542.2) - (1/2 x 144.3) = -614.35 kJ/mol
2C(s) + 3H2(g) + 1/2O2(g) ----> C2H5OH(l)
E) delat Hof = (-277) - (0) = -277 kJ/mol