Question

Why do we feel hot if we stand with our back to a fire

Answer 1

Maybe it's because of the kenitic energy released

Answer 2

When you stand near a fire the temperature around you is greater than your body temperature leading to an exchange of heat beacuse your body then gain heat from the fire that is an endothermic reaction occurs and the heat absorbs leads to an increase in your body temperature making you to feel hot.

Hope this help you!!