Fourteen moles of water at 40 oC is cooled in a freezer at ‐20 oC until all of it is frozen into ice. The process is under constant pressure of 1 bar. Calculate the ΔH involved in the process. What are the ΔV and the expansion work associated with this process? (3 pt) (‐136.9 kJ, 20.93 x10‐6 m3, ‐2.093 J) R =

im pretty sure its b

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