Question: Which of the following reactions is likely to have a negative ΔG?
Options:
Combustion of hydrocarbons.
Formation of ice from water at 0°C.
Dissolution of salt in water.
Decomposition of hydrogen peroxide.
Correct Answer: Combustion of hydrocarbons.
Solution:
The combustion of hydrocarbons is highly exothermic and typically has a negative ΔG, indicating spontaneity.
Which of the following reactions is likely to have a negative ΔG?
Practice Questions
Q1
Which of the following reactions is likely to have a negative ΔG?
Combustion of hydrocarbons.
Formation of ice from water at 0°C.
Dissolution of salt in water.
Decomposition of hydrogen peroxide.
Questions & Step-by-Step Solutions
Which of the following reactions is likely to have a negative ΔG?
Step 1: Understand what ΔG means. ΔG is the change in free energy of a reaction.
Step 2: Know that a negative ΔG means the reaction is spontaneous, meaning it can happen on its own without extra energy.
Step 3: Identify the type of reaction in the question. Combustion of hydrocarbons is a type of reaction where hydrocarbons (like gasoline) react with oxygen.
Step 4: Recognize that combustion reactions release a lot of energy (they are exothermic).
Step 5: Conclude that because combustion reactions release energy, they typically have a negative ΔG, indicating they are spontaneous.
No concepts available.
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