Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Energetics - unit 5

No description
by

Harvey Buckle

on 10 August 2016

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Energetics - unit 5

Heat
Lots of chemical reactions give out energy as heat. Getting heat by burning a fuel is a simple example, but you will probably have come across lots of others in the lab.

Other reactions need a continuous supply of heat to make them work. Splitting calcium carbonate into calcium oxide and carbon dioxide is a simple example of this.

Any chemical reaction will involve breaking some bonds and making new ones. Energy is needed to break bonds, and is given out when the new bonds are formed. It is very unlikely that these two processes will involve exactly the same amount of energy - and so some energy will either be absorbed or released during a reaction.
Heat 2
Heat is a form of _______. It is measured by the ____ k______ _____ of the particles in the SYSTEM.
A system is a reaction vessel or a place where a reaction is taking place.
Exothermic reaction
Endothermic reaction
A real example
Energy
Under discussion:
Heat is a form of energy. • Temperature is a measure of the average kinetic energy of the particles. • Total energy is conserved in chemical reactions. • Chemical reactions that involve transfer of heat between the system and the surroundings are described as endothermic or exothermic. • The enthalpy change (∆H) for chemical reactions is indicated in kJ mol-1
.
Starter
Make as many words as you can out of the word 'energetics'
Energetics - unit 5
Energy profiles
To know how reations can exchange energy
To demonstrate this with some reactions
Aim
8th August 2016
An experiment
Watch the board and complete energy profiles for all of the reactions and calculate the enthalpy changes
Full transcript