The internal energy : 1310.43 kJ/mol
<h3>Further explanation</h3>Internal energy (ΔE) can be formulated for Calorimeter :
C= the heat capacity of the calorimeter
Δt=36.2-25.68=10.52°C
- mol butane(MW=58,12 g/mol)
- the internal energy (ΔE) in KJ/mol
When placed in a freezer, liquid water turns into solid ice. Why is this considered a physical change?
2 answers:
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Answer:
0.38
Explanation:
As you go from 0 % hexane (χ = 0) to 100 % hexane (χ = 1), the refractive index decreases from 1.407 to 1.375, a decrease of 0.032.
From 1.407 to 1.3948, the decrease is 0.0122 .
That is 0.0122/0.032 = 0.38 of the distance from χ = 0 to χ = 1.
The mole fraction of hexane is 0.38.
The diagram below is a plot of refractive index vs. the mole fraction of hexane. It shows that the refractive index drops to 1.3948 when χ = 0.38.
