Oh, I have a number for you.
If you weigh 200 pounds, you probably burn around 32 calories while sitting or resting for 20 minutes. If you consume the hot pepper, your metabolism could rise as much as 8% for about 20 minutes (or less) after you consume it.
Assuming you are sitting or resting immediately
after your meal, you would burn an additional 2.56 calories as a result of the increase in metabolism from the hot pepper.
If you did this 4 times a day you've burned an extra ten calories. Since you need to burn 3500 calories to lose one pound of fat, it would take one year to lose one pound.