Podcast
Questions and Answers
What is the primary condition under which most chemical reactions are conducted in the laboratory?
What is the primary condition under which most chemical reactions are conducted in the laboratory?
- Constant pressure (correct)
- Variable pressure
- Constant temperature
- Constant volume
How is the change in internal energy (ΔE) defined during reactions conducted at constant volume?
How is the change in internal energy (ΔE) defined during reactions conducted at constant volume?
- It is the heat change without any external work being performed. (correct)
- It is the work done by the system on the surroundings.
- It is equivalent to the heat change at constant pressure.
- It measures the total energy absorbed and released during a reaction.
What new term has been introduced to study heat changes for reactions at constant pressure and constant temperature?
What new term has been introduced to study heat changes for reactions at constant pressure and constant temperature?
- Thermal energy
- Internal energy
- Enthalpy (correct)
- Heat capacity
What equation represents the definition of enthalpy?
What equation represents the definition of enthalpy?
What is the main difference between measurements taken at constant volume and constant pressure?
What is the main difference between measurements taken at constant volume and constant pressure?
Which statement correctly describes how chemists handle heat changes in reactions?
Which statement correctly describes how chemists handle heat changes in reactions?
Why can't the absolute value of enthalpy be measured?
Why can't the absolute value of enthalpy be measured?
What does the change in enthalpy ($ riangle H$) indicate?
What does the change in enthalpy ($ riangle H$) indicate?
Which of the following is true about enthalpy as a state function?
Which of the following is true about enthalpy as a state function?
Which variables are involved in the enthalpy definition equation?
Which variables are involved in the enthalpy definition equation?
Flashcards
Enthalpy
Enthalpy
A thermodynamic concept used to study heat changes in reactions at constant pressure and temperature.
Constant Volume
Constant Volume
A condition where the volume of the system remains the same during a chemical reaction.
Constant Pressure
Constant Pressure
A condition where the pressure of the system remains the same during a chemical reaction.
ΔE
ΔE
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Thermochemical measurements
Thermochemical measurements
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Enthalpy
Enthalpy
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State Function
State Function
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Enthalpy Change
Enthalpy Change
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Absolute Enthalpy
Absolute Enthalpy
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ΔH
ΔH
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