You Do Need power plug adapter while traveling from Chile to Aruba.

Here is Why You Need An Adapter

The outlet and plug type used in Aruba are A, B and F and in Chile are C and L. This is how they look like.

Chile

In Chile, outlets of type C and L are in use.

Type C

Type L

Aruba

In Aruba, outlets of type A, B and F are in use.

Type A

Type B

Type F