Podcast
Questions and Answers
What happens to the heat in an endothermic reaction?
What happens to the heat in an endothermic reaction?
- Heat is absorbed (correct)
- Heat remains constant
- Heat is emitted
- Heat is released
According to the Second Law of Thermodynamics, what is the direction of heat flow?
According to the Second Law of Thermodynamics, what is the direction of heat flow?
- From an endothermic object to an exothermic one
- From a colder object to a hotter one
- From a nonspontaneous object to a spontaneous one
- From a hotter object to a colder one (correct)
Which type of reaction is characterized by a negative ΔH value?
Which type of reaction is characterized by a negative ΔH value?
- Nonspontaneous reaction
- Endothermic reaction
- Exothermic reaction (correct)
- Spontaneous reaction
Which best describes the significance of the Second Law of Thermodynamics in chemical processes?
Which best describes the significance of the Second Law of Thermodynamics in chemical processes?
What is the effect of a negative ΔG value on a chemical reaction?
What is the effect of a negative ΔG value on a chemical reaction?
In which type of reaction is heat absorbed from the surroundings?
In which type of reaction is heat absorbed from the surroundings?
What happens if ΔG is less than 0?
What happens if ΔG is less than 0?
In which direction does a reaction proceed if ΔG is greater than 0?
In which direction does a reaction proceed if ΔG is greater than 0?
What do negative values of ΔH indicate about a reaction?
What do negative values of ΔH indicate about a reaction?
If a reaction has positive ΔS, what does it imply?
If a reaction has positive ΔS, what does it imply?
What can you conclude about a system when ΔG = 0?
What can you conclude about a system when ΔG = 0?
How can you describe a reaction with ΔG < 0?
How can you describe a reaction with ΔG < 0?
What is the standard entropy change for the reaction 2NH3(g) ⟶ NH2CONH2(aq) + H2O(l) at 25°C?
What is the standard entropy change for the reaction 2NH3(g) ⟶ NH2CONH2(aq) + H2O(l) at 25°C?
For an endothermic reaction, what can be said about the relationship between ΔH, ΔS, and ΔG?
For an endothermic reaction, what can be said about the relationship between ΔH, ΔS, and ΔG?
What does a negative value of ΔSuniv indicate regarding spontaneity?
What does a negative value of ΔSuniv indicate regarding spontaneity?
In which scenario would Gibbs’ free energy (ΔG) be negative?
In which scenario would Gibbs’ free energy (ΔG) be negative?
If a reaction has a positive value for ΔSsys, what can be concluded about the surroundings' entropy change (ΔSsurr)?
If a reaction has a positive value for ΔSsys, what can be concluded about the surroundings' entropy change (ΔSsurr)?
For an exothermic reaction, what happens to the system's entropy (ΔSsys) and the overall entropy change (ΔSuniv)?
For an exothermic reaction, what happens to the system's entropy (ΔSsys) and the overall entropy change (ΔSuniv)?
