Chapter 9 - Enthalpy Flashcards
1
Q
What is a chemical system
A
All atoms, ions, molecules that make up all the chemicals in a region of observable space
2
Q
Exothermic reactions examples
A
Oxidation
Combustion
Displacement
Neutralisation
3
Q
Endothermic reaction examples
A
Photosynthesis
Thermal decomposition
Citric acid dissolving sodium bicarbonate
4
Q
Why do average bond enthalpies vary?
A
Depends on chemical environment
E.g. different enthalpy for methanol and Methane C-H bond due to dipoles
5
Q
Average bond enthalpy
A
Average enthalpy change when one mole of bonds of gaseous covalent bonds is broken
