Calorimity Flashcards
1
Q
Calorimetry
A
the process of measuring the amount of hear released or absorbed during a chemical reaction
2
Q
How is calorimetry measured?
A
The change in temperature of the calorimeter is converted into the amount of heat energy produced by the reaction. You need to know the heat capacity of the surroundings, masses of the system and surroundings, changes in temperature
3
Q
Energy (q) =
A
Mass heated (m) x specific heat capacity (c) x temperature rise (deltaT)
4
Q
energy given out by one mole (deltaH) =
A
q/moles in reaction
5
Q
What to do (to find enthalpy of combustion/neutralization)
A
- Check for sig fig
- Check units
- Calculate q using q=mcdeltaT where m = mass of things being warmed up
- Calculate moles of whatever is reacting to raise the temperature
- delta H = q/moles
- -ve sign usually needed
- answer to sig figs in 1.