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Flashcards in Energetics Deck (8)
1

Which is the activation energy in an energetic graph?

The difference from the centre line and the highest point in the graph

2

What is the enthalpy change in an energetic graph

The difference from the centre line to the finished products

3

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)

4

What is calorimetry?

Determining the enthalpy change of a combustion reaction

5

What 4 things do we need to know for calorimetry?

1. Mass of fuel
2. Mass of water
3. Specific heat capacity of water
4. Change in temperature

6

What is the equation for energy change?

Q=CMtriangleT
Energy change = SHC of water x mass of water x temperature change

7

What is specific heat?

The amount of heat per unit mass required to raise the temperature by one degrees c

8

How do you calculate molar enthalpy changes?

1. Calculate the amount of energy transferred (calorimetry)