Entropy Flashcards
0
Q
why do larger or more complex compounds have higher molar entropies?
A
because there are more atoms and therefore more ways in which the particles can be arranged leading it to be more disordered / more ways for quanta of energy to be arranged.
1
Q
why do gases have a greater molar entropy then solids?
A
Because the molecules are less ordered than those in a solid.
2
Q
what causes the difference between theoretical and experimental values of lattice energy?
A
theoretical assumes 100% ionic character but polarisation of anions introduces a degree of covalent character.
3
Q
why are hydration enthalpies exothermic?
A
Because the ions form new ION-DIPOLE interactions with polar water molecules, releasing energy.
