5. Use the known reactions to determine the AHxn of the following reaction.
C2H4(g) + Cl2 (8) - C2H4C12 (1)
4 HCl (g) + O2(g) → 2 Cl2(g) + 2 H2O (1)
AH° = -202.4 kJ/mol
2 HCI (g) + C2H4 + 1/2O2(0) CH. Cl20) + H2O (1) AH° = -318.7 kJ/mol

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

Predict whether the changes in enthalpy, entropy, and free energy will be positive or negative for the boiling of water, and explain your predictions. how does temperature affect the spontaneity of this process?