Given the chemical equation, predict the ΔS system for this change.
1 answer:
Answer : The system for this change is, negative
.
Explanation :
Entropy : It measure the randomness and the disorderedness of the system.
As we know that the entropy increases, as we are moving from the solid state to liquid state and liquid state to gaseous state and the entropy decreases,
as we are moving from gaseous state to liquid state and liquid state to solid state.
The given reaction is,
In this reaction, the phase changes from gaseous state to liquid or aqueous state. That means the entropy of the system for this change will be negative.
Hence, the system for this change is, negative
.
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Answer:- molecules.
Solution:- The grams of tetrabromomethane are given and it asks to calculate the number of molecules.
It is a two step unit conversion problem. In the first step, grams are converted to moles on dividing the grams by molar mass.
In second step, the moles are converted to molecules on multiplying by Avogadro number.
Molar mass of = 12+4(79.9) = 331.6 g per mol
let's make the set up using dimensional analysis:
= molecules
So, there will be molecules in 250 grams of
.