chemistry for engineerss

• LAW OF CONSERVATION OF MASS - cannot appear or dissaper
• LAW OF CONVERSATION OF ENERGY - Changes from kinetic to potential but still the same amount of energy.
• FUELS - dense repositories of energy that are consumed to provide energy (heat energy)
• PRODUCT - carbon dioxide and water
• CATALYST - booster for a chemical reaction for it to happen faster.
• SOLID FUELS - biomass, fiels, gas , coals
• LIQUID FUELS - Petrol, Kerosens
• GAS FUELS - LPG (Liquified Petroleum gas)
• How do fuels generate energy

  Compression Ration - How effect the mixture of fuel and air ignition
• Higher Compression - Higher the power but it has a limit
• Engine - Internal combustion engine.
• COMBUSTION ENGINE - Intake compression combustion exhaus gas with air.
• Reactant side absorbed
• ENGINE KNOCKING - burnout too much compression ratio for the engine.
• SYSTEM - inside the jug ( is being assessed )
• SORROUNDINGS - Outside of the object that is being assessed

  OPEN SYSTEM - water bottle releases heat and vapor lesses the content of water and heat energy

  CLOSED SYSTEM - Heat is released (Energy ) but not the mass (water vapor/ water )

  ISOLATED SYSTEM - Termos ( holds heat ) no exchange mass (water vapor ) no heat transfer (Energy).
• Energy releases - loss of energy
• EXOTHERMIC PROCESS - it will be gained by the surroundings ( the energy released from the system/vapor)
• ENDOTHERMIC PROCESS - It can also gain the energy of the sorroundings

  (it can be from the sorroundings to the jar or system)
• ELECTRICAL ENERGY - MECHANICAL ENERGY - on a toy car
• THERMAL TO MECHANICAL - Heat as heated it expands
• The higher the TEMPERATURE the higher the ENERGY.

  • boilings
• PRESSURE - the higher temperature the more movement

  The higher volume - The lesser bungo (Impact )

  The lower the volume - The higher frequency of bungo ( impact )
• Joules (J) is the unit of change in internal energy work and heat
• Absorbed heat by the system - Positive side

  Give released heat by the system - Negative side
• Work is conducted by the system - POSITIVE

  Work is done on the system - NEGATIVE