Developing Fuels Flashcards
What does the enthalpy change tell us?
The amount of energy transferred to or from the surrounding in a chemical reaction
What are the standard conditions for enthalpy changes?
25 degrees 100 kPa
What is enthalpy
The internal energy in a system
What is the equation for change in thermal energy?
Q=MCdeltaT
How does spectroscopy work?
Ions dipped in solution and placed under a flame to determine their ions and the way the atoms are held
What happens to electrons when they gain extra energy?
They get excited and move up a shell
What is the energy gap?
It is the space between a level and the amount of energy needed to get to that next level- this is unique for each element
What is the absorption spectra?
White background, black lines
What is a chain isomerism?
The carbon chain has a different arrangement
What is a functional group isomerism?
There are different functional groups in the compound
What is a positional isomerism?
The functional group is in a different position in the chain/molecules
What is stereoisomerism?
The lack of free rotation around a double bond
Why do alkenes have stereoisomers?
They have the lack of free rotation around a double bond
What is internal energy?
The sum of the kinetic and potential energies of the particles making up a substance
Define enthalpy change of neutralisation
When one mole of hydrogen ions react with one mole of NaOH ions to form one mole of water in standard states and conditions
