(sorry about delay responding) Yes it seems to stay around 75C for the entire Handbrake project, when I'm running Lobotomo "Fan Control". However I am in a fairly cold room about 18C. I think I saw Handbrake push the temps a little higher maybe 80C in the summer, and the exact type of Handbrake run seems to make a difference too, even though they all work the CPUs heavily.
What I like about Lobotomo Fan Control is it gradually raises the fan speed as CPU temperature rises, keeping things under control, and the rising fan noise lets me know something is happening, such as one of those Web browser pop-up ads that is hidden under another browser window.