Consider the reaction: with A, represented by and B, represented by If 7.00 mol A, and 5.00 mol B, combine and react as indicated in the image below: ●● Which is the limiting reactant? How many 3 A₂+2 B2 → 2 A3B2 Which is the excess reactant? V moles of product (A,B₂) are formed? v How many moles of excess reactant are left over? V the products (for you to figure o
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.
Which is the limiting reactant? 1) A3B2 2) A2 3) B2
how many moles of products (A3B2) are formed? 1) 10.5 2) 7.50 3) 3.33 4) 4.67
which is the excess reactant? 1) A3B2 2) A2 3) B2
how many moles of excess reactant are left over? 1) .75 2) .67 3) .33 4) .50
![**Chemical Reaction Analysis**
*Consider the reaction:*
\[ 3 \, \text{A}_2 + 2 \, \text{B}_2 \rightarrow 2 \, \text{A}_3\text{B}_2 \]
- **A\(_2\)** is represented by dark brown pairs of circles.
- **B\(_2\)** is represented by yellow pairs of circles.
*Scenario:*
If 7.00 mol of A\(_2\) and 5.00 mol of B\(_2\) combine and react as indicated in the image below:
- A visual representation shows a mix of dark brown and yellow pairs on the left, indicating reactants, transitioning to products through an arrow labeled "the products (for you to figure out)."
*Interactive Questions:*
1. **Which is the limiting reactant?** [Dropdown menu]
2. **How many moles of product (A\(_3\)B\(_2\)) are formed?** [Dropdown menu]
3. **Which is the excess reactant?** [Dropdown menu]
4. **How many moles of excess reactant are left over?** [Dropdown menu]
This setup provides an educational tool for students to learn about stoichiometry, limiting reactants, and product formation in chemical reactions.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F78a96f4b-c4a7-4e44-95dd-3606c481f172%2F649eb823-94d1-470d-9b3d-5a63d8f4070a%2F8u7sxp_processed.jpeg&w=3840&q=75)
Limiting reagent is one which is present in less amount than the required amount.
Limiting reagent is one which consumes firstly in the reaction.
It decides the yield of products.
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