Consider the combustion of 1 kmol of propane with air at 1 atm. construct a single graph using h-t coordinates that shows the following: a. reactants' enthalpy, h, in kj versus temperature, over the range of 298–800 k for o = 1.0. b. repeat part a for =0.75. repeat part a for q = 1.25. d. products' enthalpy, h, for ideal combustion (no dissociation) versus temperature, over the range of 298–3500 k for 0 = 1.0. e. repeat part d for q = 0.75. f. repeat part d for ø = 1.25, using the water-gas equilibrium to ac- count for incomplete combustion.

a is the correct answer

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o