Air in a piston–cylinder assembly undergoes a process from state 1, where T1 = 300 K, p1 = 100 kPa, to state 2, where T2 = 500 K, p2 = 650 kPa. Using the ideal gas model for air, determine the change in specific entropy between these states, in kJ/kg ⋅ K, if the process occurs (a) without internal irreversibilities, (b) with internal irreversibilities.

i would say b

explanation:

but i think i would need more information than that

the answer to your question is c

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