Yes, you can wipe Chrome OS and install Linux Mint. The only thing about C7 Chromebook is the below average battery life 3.5-4 hours.
so would it be any different from say a run of the mill lappy ? ( installing mint that is ) I am thinking of doing this . I have a 60gb ssd doing nothing but colecting dust . so I pick up a usb dvdrw and plug that in with a copy of linux mint 32bit