Energy Changes RP (P1) Flashcards
1
Q
How do you work out the total energy change
A
Reactants - products
2
Q
When is energy absorbed and released?
A
It is absorbed when bonds are broken and released when bonds are made
3
Q
Method
A
Add 30cm3 dilute sulfuric acid to the polystyrene cup with a pipette
Put the cup in a beaker
Use the thermometer to measure the starting temperature
Put 5cm3 sodium hydroxide until you reach 40
Put the lid on and measure the temperature between each as quickly as possible.
Use a second trial to find a mean and ensure accurate results
