Show work in/with: Heat of fusion: Hf = 334 J/g, Q = m. Hf Heat of vaporization: Hv = 2260 J/g, Q = m. Hv 2.1 J/g˚C Heat capacity (S) of solid water Q = m. S. ΔT 2.03 J/g˚C Heat capacity (S) of water vapor Q = m. S. ΔT 4.18 J/g˚C Heat capacity (S) of liquid water Q = m. S. ΔT Question: 1. How much energy (in KJ) is required to convert 50.0g of ice at – 30 ˚C to steam at130˚C.

personal, she chose to do it.

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