Thermochemistry

Thermochemistry is.....

• The study of CONCENTRATION CHANGE in chemical reactions

• The study of HEAT CHANGE in chemical reactions

• The study of PRESSURE CHANGE in chemical reactions

• The study of MOLE CHANGE in chemical reactions

Standard Condition means...

• Temperature of 25^oC/ 298K

• Pressure of 1 atm

• Concentration of 1M for aqueous solution

• 1 mole compound

amount of heat absorbed or released by a system in a chemical reaction is called

• Concentration Change of Reaction

• Molar Change of Reaction

• Pressure Change of Reaction

• Enthalpy Change of Reaction

This reaction is...

• Exothermic

• Endothermic

This reaction is...

• Exothermic

• Endothermic

Endothermic reaction means...

• Releases heat to its surroundings
• Absorbs heat from its surroundings
• Occurs at a constant temperature
• Does not involve any heat exchange

Exothermic reaction means...

• Releases heat to its surroundings
• Absorbs heat from its surroundings
• Occurs at a constant temperature
• Does not involve any heat exchange

Standard enthalpy of formation

• Change in entropy when one mole of a substance is formed from its elements in their standard states
• The energy required to break one mole of a substance into its elements in their standard states
• The energy release to break one mole of a substance into its elements in their standard states

• Change in enthalpy when one mole of a substance is formed from its elements in their standard states under standard conditions.

All of the reaction refer to DEFINITION OF

• STANDARD ENTHALPY OF FORMATION

• STANDARD ENTHALPY OF NEUTRALISATION

• STANDARD ENTHALPY OF COMBUSTION

• STANDARD ENTHALPY OF ATOMISATION

All of the reaction refer to DEFINITION OF

• STANDARD ENTHALPY OF FORMATION

• STANDARD ENTHALPY OF NEUTRALISATION

• STANDARD ENTHALPY OF COMBUSTION

• STANDARD ENTHALPY OF ATOMISATION