PHYS 104 1st Edition Lecture 16Outline of Last Lecture I. Thermal energy and temperatureII. First law of thermodynamicsIII. Heat capacityIV. Ideal gasesOutline of Current Lecture V. Ideal gasesVI. Work done on an ideal gasVII. Second law of thermodynamicsVIII. Entropy Current Lecture- Moles and Moleculeso One mole of any substance contains 6*10^23 mol^-1- Thermal energy and temperatureo Thermal energy of an ideal gas is equal to the total kinetic energy of the moving atoms in the gaso Heating a gas causes the atoms to move faster (inc thermal energy)o Heating increases temperatureo K = ½ mv2- Work in ideal gas processeso The work done on the gas by the environment is equal to the negative of the area under the pressure versus volume grapho Graph of an isothermal process is a hyperbola- Adiabatic processeso When heat is not transferredo Allows work rather than heat to change the temperatureo Expansion lowers tempo Compression raises temp- Zeroth lawo Two systems place in thermal contact will transfer thermal energy from hot to cold until their final temperatures are the same Thermal equilibriumo Hot to cold is irreversibleThese 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.- Second Law of Thermodynamicso Entropy never decreaseso Only increases or reaches zero Equilibriumo Entropy Measure of disorder Macro states and microstates S = k * ln W Proportional to
View Full Document