23. In the reaction between copper(II) chloride and aluminum metal to form aluminum chloride and copper metal, what change in charge is observed? 3 Cucl, + 2 AI → 2 AICI, + 3 Cu a. copper decreases in charge from +1 to 0 b. aluminum decreases in charge from 0 to -3 c. aluminum increases in charge from 0 to +3 d. copper increases in charge from 0 to +2
Thermochemistry
Thermochemistry can be considered as a branch of thermodynamics that deals with the connections between warmth, work, and various types of energy, formed because of different synthetic and actual cycles. Thermochemistry describes the energy changes that occur as a result of reactions or chemical changes in a substance.
Exergonic Reaction
The term exergonic is derived from the Greek word in which ‘ergon’ means work and exergonic means ‘work outside’. Exergonic reactions releases work energy. Exergonic reactions are different from exothermic reactions, the one that releases only heat energy during the course of the reaction. So, exothermic reaction is one type of exergonic reaction. Exergonic reaction releases work energy in different forms like heat, light or sound. For example, a glow stick releases light making that an exergonic reaction and not an exothermic reaction since no heat is released. Even endothermic reactions at very high temperature are exergonic.
![### Chemical Reaction and Charge Changes
**Topic: Redox Reactions**
#### Question:
In the reaction between copper(II) chloride and aluminum metal to form aluminum chloride and copper metal, what change in charge is observed?
#### Reaction Equation:
\[ 3 \text{CuCl}_2 + 2 \text{Al} \rightarrow 2 \text{AlCl}_3 + 3 \text{Cu} \]
#### Options:
a. Copper decreases in charge from +1 to 0
b. Aluminum decreases in charge from 0 to -3
c. Aluminum increases in charge from 0 to +3
d. Copper increases in charge from 0 to +2
#### Explanation:
In this redox reaction, let's analyze the oxidation states:
- **Copper (Cu):**
- In \(\text{CuCl}_2\), copper is in the +2 oxidation state.
- In the product form, copper is in its metallic state (Cu), which has an oxidation state of 0.
- Thus, copper decreases in charge from +2 to 0.
- **Aluminum (Al):**
- Aluminum starts in its elemental form with an oxidation state of 0.
- In \(\text{AlCl}_3\), aluminum has an oxidation state of +3.
- Thus, aluminum increases in charge from 0 to +3.
The correct option is:
**c. Aluminum increases in charge from 0 to +3**](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F7345e8e6-7416-43d6-9fee-55115ecf20af%2F118709e5-8b37-4bca-8591-180fe57a31ab%2F2zdta6j_processed.jpeg&w=3840&q=75)
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 1 images
