Praktikum Kimia Reaksi Eksoterm & Endoterm Menggunakan Adem Sari dan Detergen

Summary

This practical experiment aims to demonstrate exothermic and endothermic reactions by observing the temperature changes when dissolving Adem Sari and detergent powders in water. The experiment explores why Adem Sari cools the surroundings (endothermic reaction) and detergent warms them (exothermic reaction). It highlights the concepts of thermochemistry, explaining how heat is absorbed or released during chemical processes, with positive enthalpy changes for endothermic reactions and negative changes for exothermic ones. The practical successfully demonstrates these principles, providing a hands-on understanding of thermal reactions in everyday substances.

Takeaways

• 😀 The objective of the experiment is to demonstrate exothermic and endothermic reactions.
• 😀 The experiment seeks to answer why detergent feels warm during washing and why Adem Sari cools the throat.
• 😀 The problem formulation focuses on understanding the reactions occurring when Adem Sari and detergent are dissolved in water.
• 😀 Thermochemistry is the study of heat changes that occur during chemical and physical reactions.
• 😀 Exothermic reactions release heat into the surroundings, resulting in an increase in environmental temperature and a decrease in the system's enthalpy.
• 😀 Endothermic reactions absorb heat from the surroundings, causing a decrease in environmental temperature and an increase in the system's entropy.
• 😀 The hypothesis suggests that the dissolution of Adem Sari is an endothermic reaction, while the dissolution of detergent is an exothermic reaction.
• 😀 Materials needed for the experiment include a spoon, 2 glasses (240 mL), Adem Sari powder, detergent powder, and mineral water.
• 😀 The procedure involves dissolving Adem Sari and detergent in water and observing the temperature change in the glasses.
• 😀 Observations indicate that the dissolution of Adem Sari causes the temperature to decrease (endothermic reaction), while the dissolution of detergent causes the temperature to increase (exothermic reaction).

Q & A

What is the main purpose of the experiment described in the transcript?

The main purpose of the experiment is to demonstrate and prove the occurrence of exothermic and endothermic reactions through practical observation.

What are the two types of reactions discussed in the script?

The two types of reactions discussed are exothermic reactions, which release heat, and endothermic reactions, which absorb heat.

What does thermochemistry study, as mentioned in the script?

Thermochemistry is the branch of chemistry that studies the heat or thermal energy changes associated with chemical and physical reactions or processes.

What happens during an exothermic reaction?

In an exothermic reaction, heat is released from the system to the surroundings, causing an increase in the surrounding temperature and a decrease in the enthalpy of the system.

How is enthalpy related to the reactions described in the experiment?

Enthalpy refers to the total energy in a system. In exothermic reactions, enthalpy decreases (negative change), while in endothermic reactions, enthalpy increases (positive change).

What is observed when Adem Sari powder is dissolved in water, according to the script?

When Adem Sari powder is dissolved in water, the solution feels cold, indicating that an endothermic reaction is occurring, where heat is absorbed from the surroundings.

What is the hypothesis for the Adem Sari and detergent reactions?

The hypothesis is that an endothermic reaction occurs with Adem Sari, and an exothermic reaction occurs with detergent.

What occurs when detergent powder is dissolved in water?

When detergent powder is dissolved in water, the solution feels warm, indicating that an exothermic reaction is happening, where heat is released to the surroundings.

What was the difference in temperature observed for the solutions of Adem Sari and detergent?

The solution of Adem Sari cooled down (temperature decreased), indicating an endothermic reaction, while the detergent solution warmed up (temperature increased), indicating an exothermic reaction.

What are the final conclusions drawn from the experiment?

The experiment concluded that detergent undergoes an exothermic reaction because it releases heat, while Adem Sari undergoes an endothermic reaction because it absorbs heat.