Energy of Reactions Flashcards
1
Q
What is the first and second law of thermodynamics?
A
1- Energy cannot be created or destroyed, but only transformed from one kind of energy to another
2- The entropy of an isolated system never decreases
2
Q
What is internal energy?
A
The sum of all the kinetic and potential energies of all its components
3
Q
What happens when 🔺U is positive?
A
Ufinal is greater than Uinitial, indicating the system has gained energy from surroundings
4
Q
What happens when 🔺U is negative?
A
Ufinal is less than Uinitial, indicating that the system has lost energy to the surroundings
5
Q
What does exothermic mean?
A
System absorbs heat from surroundings
6
Q
What does exothermic mean?
A
System loses heat to the surroundings
7
Q
What is enthalpy?
A
The sum of a systems internal energy
