Enthalpy
- Created by: LauraNannini
- Created on: 24-04-20 11:13
View mindmap
- Topic 8
- Exothermic
- Heat transfers to the surroundings
- Overall change in enthalpy is negative
- Endothermic
- Heat transfers from the surroundings into the system
- Overall change in enthalpy is positive
- Standard enthalpy of combustion
- When one mole of a substance is completely burnt in oxygen in standard conditions
- To find the enthalpy change of combustion in a liquid, a known mass is burned and used to heat a known volume of water
- Q= mc T
- Standard enthalpy of neutralization
- One mole of water is produced by neutralisation of an acid and an alkali
- Measure temperature of acid of alkali before and after mixing them
- Standard enthalpy of formation
- When one mole of a substance is formed from its elements in standard states
- Hess's law
- enthalpy change os a reaction of the path taken in converting reactants into products providing the initial and final conditions are the same in each case
- Method: 1- reverse second equation and then add to the first
- Bond enthalpy
- Bond breaking - bond making = enthalpy change of reaction
- Exothermic
Similar Chemistry resources:
Teacher recommended
Comments
No comments have yet been made