How long do I have to chew a gumball to hit negative calories?

Factual Questions
1

I was chewing on a big, stiff gumball yesterday until my jaw got sore. It occurs to me that I might have actually burned more calories chewing on the damned thing than I got from all the sugar in it. I got to wondering what the break even point is. How long do I have to chew gum before I start running a calorie deficit?

I realize there are a lot variables here as there is no “standard” gumball.

2

Surprisingly little variables. According to this chart, most sugar containing bubble gums have around 25 calories per piece. According to this site, chewing gum burns 11 calories per hour. So you’d have to chew for roughly 2.5 hours to hit “zero” and over that you’re negative.