If the actual change in energy was greater than o equal to the energy needed for a phase change to
occur, then we know a phase change occurred.
Lets analyze the isopropanol example,
The arrow labeled with the red "A" hexagon is
the actual energy change.
This arrow is longer than the energy needed for
a phase change to occur arrow, which is dotted
and labeled with a red "Z" box.
Question: What does the above information
implies about a phase change in the
isopropanol? (in other words, did we have a
phase change). Explain.

Not a  mixture of two common elements that can be separated by physical means.

1. why does the same side of the moon always face earthc.the rotational period of the moon is equal to one revolution around earth2. which is greater the moons period of rotation or its period of revolution  b.the moons revolution period around earth3.what was the major accomplishment of the apollo missions  d.landing on and exploring the moon4. which of these space missions involved the deployment of lunar rovers d.apollo5. which scientists are going to explore next on kepler-186fd. evidence of existence of life6.which mission is not going to explore the outside of the solar systemb.safir7.which technology limit the future of space exploration b. scientist must first develop certain technologies before missions can be completed.

The correct answer to this question is 28 

The correct answer is:   [a]:   "polar easterlies move cool air to the mid-latitudes."