Which of the following statements concerning the attraction of ions to polar molecules is/are CORRECT? 1. The force of attractio
1 answer:
Answer:
1, 2 and 3 are correct.
Explanation:
The force of the attraction is calculated by Coulomb's law as:
Where,
K is the Coulomb's constant having value 9×10⁹ N. m²/C²
are the charges on the dipole and ion respectively.
d is the distance between them.
Since F is inversely proportional to square of distance between them, so statement 1 is true.
F is directly proportional to the charge , so on increasing charge, force of attraction increases. Hence, statement 2 is true.
The greater the magnitude of the dipole means the greater the charge on dipole. Hence, statement 3 is also true.
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Answer:
a)
b) entropy of the sistem equal to a), entropy of the universe grater than a).
Explanation:
a) The change of entropy for a reversible process:
The energy balance:
If the process is isothermical the U doesn't change:
The work:
If it is an ideal gas:
Solving:
Replacing:
Given that it's a compression: V2<V1 and ln(V2/V1)<0. So:
b) The entropy change of the sistem will be equal to the calculated in a), but the change of entropy of the universe will be 0 in a) (reversible process) and in b) has to be positive given that it is an irreversible process.