CHEM 102 1nd Edition Lecture 5Outline of Last Lecture I. Gibbs free energyII. EnthalpyIII. Elements in standard stateIV. State functionV. First law of thermodynamicsVI. Spontaneous reactionsOutline of Current Lecture VII. First law of thermodynamicsVIII. Temperature vs. heatIX. System vs. surroundingsCurrent Lecture- First law of thermodynamics: energy can neither be created nor destroyedo The total energy of the universe is constant- Temperature vs. heato Heat is not the same as temperatureo The more thermal energy a substance has, the greater the motion of its atoms and moleculeso The total thermal energy in an object is sum of all the individual energies of all the atoms, molecules, ions in object- System vs. surroundingso In thermodynamics, they have precise definitions o System-object on group of objects being studiedo Surroundings-everything elseo Exothermic-system loses heat to the surroundings o System gains heat from surroundings- Endothermico Heat is absorbed by system as solidliquidgaso This process of breaking intermolecular forces is endothermic- Exothermico Heat is released by system as gasliquidsolido This process is called exothermicThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- The amount of heat absorbed or released by a system during phase changes can be accurately
View Full Document
Unlocking...