In photosynthesis, green plants convert carbon dioxide and water into glucose (C 6 H 12 O 6 ) according to the following equation: 6 CO 2 (g) + 6 H 2 O(l) → C 6 H 12 O 6 (aq) + 6 O 2 (g) b. Is the reaction endothermic or exothermic?

Hello. In this problem, we're told that during an alcoholic fermentation, yeast converts glucose into ethanol and carbon dioxide is the process exo thermic or endo thermic. When a chemical reaction occurs, we have to break bonds in our reactant. This requires an input of energy. So this is endo thermic when we form our products were forming new bonds. When we form new bonds, we get energy out. So this is a thermic. Whether a reaction is endo thermic or exo thermic depends on the balance of these two. In the case of alcoholic fermentation, this is a type of cellular respiration. Cellular respiration is eggs are thermic. So that says then that we get more energy out of forming new bonds than we had to put into break bonds. The answer to the question then again is this process of cellular respiration is Xr thermic. Thanks for watching. Hope this helps.

Ch.7 Chemical Reactions: Energy, Rate and Equilibrium

McMurry - Fundamentals of GOB 8th Edition

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McMurry 8th Edition

Ch.7 Chemical Reactions: Energy, Rate and Equilibrium

Problem 3b

Chapter 7, Problem 3b

In photosynthesis, green plants convert carbon dioxide and water into glucose (C₆H₁₂O₆) according to the following equation:
6 CO₂(g) + 6 H₂O(l) → C₆H₁₂O₆(aq) + 6 O₂(g)
b. Is the reaction endothermic or exothermic?

Verified step by step guidance

Step 1: Understand the terms 'endothermic' and 'exothermic'. An endothermic reaction absorbs energy (usually in the form of heat) from its surroundings, while an exothermic reaction releases energy to its surroundings.

Step 2: Analyze the photosynthesis reaction. The equation provided is: 6 CO2(g) + 6 H2O(l) → C6H12O6(aq) + 6 O2(g). This reaction involves the formation of glucose (C6H12O6) and oxygen (O2) from carbon dioxide (CO2) and water (H2O).

Step 3: Recall that photosynthesis requires sunlight as an energy source. Plants absorb light energy (a form of energy input) to drive the reaction forward, indicating that energy is being absorbed.

Step 4: Recognize that the absorption of energy (in this case, light energy) is a characteristic of an endothermic reaction. The energy is used to break bonds in CO2 and H2O and form new bonds in glucose and oxygen.

Step 5: Conclude that the reaction is endothermic because it requires an input of energy (light) to proceed, rather than releasing energy to the surroundings.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Photosynthesis

Photosynthesis is the biochemical process by which green plants, algae, and some bacteria convert light energy into chemical energy. During this process, they use sunlight to transform carbon dioxide and water into glucose and oxygen. The overall reaction is represented by the equation: 6 CO2 + 6 H2O → C6H12O6 + 6 O2, highlighting the essential role of light energy in driving this transformation.

Endothermic and Exothermic Reactions

Chemical reactions can be classified as endothermic or exothermic based on their energy changes. Endothermic reactions absorb energy from their surroundings, resulting in a decrease in temperature, while exothermic reactions release energy, often in the form of heat, leading to an increase in temperature. Understanding this distinction is crucial for analyzing the energy dynamics of photosynthesis.

Energy Transfer in Photosynthesis

In photosynthesis, energy transfer occurs as light energy is captured by chlorophyll and converted into chemical energy stored in glucose. This process requires energy input, making it endothermic. The absorbed energy drives the conversion of carbon dioxide and water into glucose, illustrating how energy is essential for the synthesis of organic compounds in plants.

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Based on bond energies, which atmospheric gas in each pair do you think is more stable? Explain.

a. O₂ or N₂

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Textbook Question

In photosynthesis, green plants convert carbon dioxide and water into glucose (C₆H₁₂O₆) according to the following equation:

6 CO₂(g) + 6 H₂O(l) → C₆H₁₂O₆(aq) + 6 O₂(g)

a. Estimate ∆H for the reaction using bond dissociation energies from Table 7.1. Give your answer in kcal/mol and kJ/mol. (C₆H₁₂O₆ has five C―C bonds, seven C―H bonds, seven C―O bonds, and five O―H bonds).

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Textbook Question

The following equation shows the conversion of aluminum oxide (from the ore bauxite) to aluminum:

2 Al₂O₃(s) → 4 Al(s) + 3 O₂(g) ∆H = +801 kcal/mol (+3350 kJ/mol)

c. How many kilocalories are required to produce 10.0 g of aluminum? How many kilojoules?

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Does entropy increase or decrease in the following processes?

a. Polymeric complex carbohydrates are metabolized by the body, converted into smaller simple sugars.

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Textbook Question

Does entropy increase or decrease in the following processes?

c. 2 SO₂(g) + O₂(g) → 2 SO₃(g)

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In photosynthesis, green plants convert carbon dioxide and water into glucose (C6H12O6) according to the following equation:6 CO2(g) + 6 H2O(l) → C6H12O6(aq) + 6 O2(g) b. Is the reaction endothermic or exothermic?

Verified video answer for a similar problem:

Key Concepts

Photosynthesis

Endothermic and Exothermic Reactions

Energy Transfer in Photosynthesis

In photosynthesis, green plants convert carbon dioxide and water into glucose (C₆H₁₂O₆) according to the following equation:
6 CO₂(g) + 6 H₂O(l) → C₆H₁₂O₆(aq) + 6 O₂(g)
b. Is the reaction endothermic or exothermic?