Whatlis the maximum number of electrons the n = 4 shell can contain

32

Explanation:

The maximum number of electrons can be calculated by using the expression 2n2

when n = 4

substitute n for 4

2(4)2

2(16) = 32

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 .