Chapter U5, Problem 1RE

Interpretation Introduction

Interpretation: The things that are learnt about fire in this unit needs to be explained.

Concept introduction: Energy combined with fires has many uses like heating home, cooking food, and moving cars, etc.

Answer to Problem 1RE

Fire releases energy in the form of heat and light and it is an exothermic chemical change.

Explanation of Solution

Fire is an exothermic chemical change. It releases energy in form of heat and light. Fires are not only source of energy resulting from chemical change. Fire produces bright light and transfers energy. Fire and extremely hot objects transfer energy as electromagnetic radiation. Fire is central to lives. Most familiar fires are oil, and gas fires, oil, wood, etc. Brilliant flames leap into air and the flame is intense heat when these substances are ignited.

Conclusion

Fire releases energy from combustion reaction. Fire can be stopped whenever product of combustion reaction ${\text{CO}}_{\text{2}}$ is supplies in access.