What are the different tasks duties I should expect to perform in a..

What state are you in? Since you're using the title of 'LVN,' I can safely guess you're either in California or Texas.

If you're in CA, your scope of practice will be very limited by your state's nurse practice act and you will basically be administering oral medications, performing dressing changes, reporting changes in condition to the RN, applying topical creams and patches, checking vital signs, giving injections, performing urinary catheter care, doing tracheostomy care, managing colostomies, and other random things.

If you're in Texas, your scope of practice will be wide open and you are going to do almost everything that the RN does. In addition to the tasks I mentioned above, you'll also be in charge of your own patient load, starting peripheral IVs, drawing blood from PICCs and central lines, giving meds by IV push and IV piggy back, monitoring blood transfusions, discharging patients, obtaining telephone orders, charting on your patients, changing central line dressings, monitoring infusions of TPN and ProcAlamine, removing sutures and staples, applying CPM machines, and so much more.

Under the all-nurses tab of "specialties" rehab nursing is listed.

I worked stroke/trauma rehab a million years ago and then only as a night float. It was mainly assisting patients to learn the basic ADL's. How to dress themselves, how to walk, how to propel themselves with their wheelchairs, help transfer them from bed to wheelchair, bowel and bladder training, etc. (Not that I even did a lot of this on the night shift.)

However Rehab is a very general term. I don't even know if this is the kind of "rehab" facility you are applying for.

Give more details about what type of rehab facility it is and maybe post on the rehab site if you don't get much response here?