Chapter U5.2, Problem 1TAI

Interpretation Introduction

Interpretation: In a chemical process the direction of heat needs to be explained.

Concept introduction: In exothermic reactions reactants changes into products that are very hot. Over time hot products cool down as they transfer heat to the surrounding. When heat is transferred from surroundings to the system, the process is endothermic.

Answer to Problem 1TAI

During a chemical process heat transferred either into the system or out of the system.

Explanation of Solution

Heat is transfer of energy between two objects due to temperature differences. Heat transferred leads all chemical changes. The heat is transferred either into the system or out of the system. Exothermic reactions are chemical process that results in the transfer heat from the process of reaction to the surrounding. The reaction feels hot to observer. Endothermic reactions are chemical process that results in transfer of heat from surrounding to the process of reaction. These reactions feel cool to the observer because temperature is directly connected to motion of molecules.

Conclusion

In a chemical process colder products mean slower moving molecules and hotter products mean faster moving molecules.