Homework Answers
Molar mass of C8H18 = 114.33 g/mol
mass(C8H18)= 100.0 g
use:
number of mol of C8H18,
n = mass of C8H18/molar mass of C8H18
=(100 g)/(114.33 g/mol)
= 0.8755 mol
Since Δ H is positive, heat is absorbed
when 2 mol of C8H18 reacts, heat absorbed = 11018.0 KJ
So,
for 0.8755 mol of C8H18, heat absorbed = 0.8755*11018.0/2 KJ
= 4.82*10^3 KJ
Answer: OPTION 2
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