Energetics Flashcards
Which is the activation energy in an energetic graph?
The difference from the centre line and the highest point in the graph
What is the enthalpy change in an energetic graph
The difference from the centre line to the finished products
In an energetics graph, why does the line rise then sink
Energy is taken from the surroundings to break bonds (rise)
Energy is released from making new bonds (drop)
What is calorimetry?
Determining the enthalpy change of a combustion reaction
What 4 things do we need to know for calorimetry?
- Mass of fuel
- Mass of water
- Specific heat capacity of water
- Change in temperature
What is the equation for energy change?
Q=CMtriangleT
Energy change = SHC of water x mass of water x temperature change
What is specific heat?
The amount of heat per unit mass required to raise the temperature by one degrees c
How do you calculate molar enthalpy changes?
- Calculate the amount of energy transferred (calorimetry)
