According to Boltzmann reaction entropy difference between two states is given by ΔS and is equal to 5.76 .
According to Boltzmann Reaction:
S= kB lnW
Where,
W is number of Arrangements possible
Now ,
ΔS = S(final) - S(initial)
S(initial) = kBln1 (Since only one arrangement is possible)
= 0
Again,
S(final) = kBln2^n
Now,
As A-B can exist as A-B or B-A .
Hence, two arrangements are possible and since 1 mole of species .
Hence, 2^n
S(final) = N kB ln2
=R ln 2
= 8.314 ×2.303× log 2
Hence,
S(final) = 5.76
ΔS = 5.76 -0
=5.76
Thus, from the above conclusion we can say that, according to Boltzmann reaction entropy difference between two states is given by ΔS and is equal to 5.76 .
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Answer:
0.034 mol (4dp)
Explanation:
Use the formula n = m/M where n= number of moles, m=mass in grams and M=molar mass in g/mol.
Therefore to find how many moles, divide the mass in grams (2) by the molar mass of sodium chloride which is 22.99+35.45
Elements are represented by a chemical symbol, which is usually the first letter or two letters of the elements name.
hope this helps!
We are going to use the half-life formula:
the no. of half-lives = the total time/time for one half-life
when the total time = 555 years
and the time for one half-life = 111 years
so by substitution:
∴ no. of half-lives = 555 / 111
= 5