What conclusion can you draw from the heating curve?

A)
The absolute value of the heat of sublimation is equal to the absolute value of the heat of deposition.

B)
The heat of sublimation is equal to the sum of the heat of vaporization and the heat of freezing.

C)
The absolute value of the heat of deposition is equal to the sum of the absolute value of the heat of vaporization and the absolute value of the heat of freezing.

D)
The heat of sublimation is equal to the sum of the heat of vaporization and the heat of melting.

what is the question?

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