Phosgene, COCl2, can be formed by the reaction of chloroform, CHCl3(l) with oxygen:  2CHCl3(l) + O2(g) → 2COCl2(g) + 2HCl; ∆H = -353.2 kJ; ∆G = -452.4 kJ at 25 ᴼC.  Calculate ∆So for the reaction. Is the sign reasonable?

Calculate ΔrH° for the combustion of methane gas, CH4 : CH4(g)  +   2 O2(g)  →   CO2(g)  +  2 H2O(g) using standard molar enthalpies of formation: molecule                                  ΔfH° (kJ/mol) CH4(g)                                          -74.6 CO2(g)                                          -393.5 H2O( g)                                         -241.8   a) -802.5 kJ b) -495.2 kJ c) +802.5 kJ          d) -1460.3 kJ      e) -1828.5 kJ Group of answer choices

Part 1 and part 2 go together For part 2, Then use the data below to calculate ∆G rxn using free energies of formation.

For each of the following processes, indicate whether the signs of ∆S and ∆H are expected to be positive, negative, or about zero. A piece of charcoal is combusted to form CO21g2 and H2O1g2