Default [Q] Typical CPU temperature for Galaxy Note 10.1 (2014 edition)?

I noticed that my refurbished Note tends to get really warm, so I installed the System Tuner app to check the tablet's CPU temperature. It turns out that the Note's CPU temperature idles at ~50C and goes well into the 70s under moderate use (internet, facebook, etc). Is this something I should be worrying about? I only got this Note today so I can easily get it replaced, but I only want to do so if this is out of the ordinary. What're the typical operating temperatures for the Galaxy Note, and should I be worried that mine gets so hot?